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| GitHub |
| <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>IoTDB用户手册 (In progress)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>IoTDB简介</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>快速上手</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>数据模式与概念</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>语法约定</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>应用编程接口</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>元数据操作</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>数据写入和删除</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>数据查询</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>数据处理</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>权限管理</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>运维工具</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>系统集成</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>集群搭建</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>UDF 资料库</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>参考</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/zh/UserGuide/V0.13.x/Reference/Config-Manual.html" aria-current="page" class="active sidebar-link">配置参数</a></li><li><a href="/zh/UserGuide/V0.13.x/Reference/Keywords.html" class="sidebar-link">关键字</a></li><li><a href="/zh/UserGuide/V0.13.x/Reference/Frequently-asked-questions.html" class="sidebar-link">常见问题</a></li><li><a href="/zh/UserGuide/V0.13.x/Reference/TSDB-Comparison.html" class="sidebar-link">时间序列数据库比较</a></li></ul></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="配置参数"><a href="#配置参数" class="header-anchor">#</a> 配置参数</h1> <p>为方便 IoTDB Server 的配置与管理，IoTDB Server 为用户提供三种配置项，使得用户可以在启动服务或服务运行时对其进行配置。</p> <p>三种配置项的配置文件均位于 IoTDB 安装目录：<code>$IOTDB_HOME/conf</code>文件夹下，其中涉及 server 配置的共有 2 个文件，分别为：<code>iotdb-env.sh</code>, <code>iotdb-engine.properties</code> |
| 。用户可以通过更改其中的配置项对系统运行的相关配置项进行配置。</p> <p>配置文件的说明如下：</p> <ul><li><p><code>iotdb-env.sh</code>：环境配置项的默认配置文件。用户可以在文件中配置 JAVA-JVM 的相关系统配置项。</p></li> <li><p><code>iotdb-engine.properties</code>：IoTDB 引擎层系统配置项的默认配置文件。用户可以在文件中配置 IoTDB 引擎运行时的相关参数，如 JDBC 服务监听端口 (<code>rpc_port</code>)、overflow |
| 数据文件存储目录 (<code>overflow_data_dir</code>) 等。此外，用户可以在文件中配置 IoTDB 存储时 TsFile 文件的相关信息，如每次将内存中的数据写入到磁盘时的数据大小 (<code>group_size_in_byte</code>) |
| ，内存中每个列打一次包的大小 (<code>page_size_in_byte</code>) 等。</p></li></ul> <h2 id="热修改配置项"><a href="#热修改配置项" class="header-anchor">#</a> 热修改配置项</h2> <p>为方便用户使用，IoTDB Server 为用户提供了热修改功能，即在系统运行过程中修改<code>iotdb-engine.properties</code>中部分配置参数并即时应用到系统中。下面介绍的参数中，改后 生效方式为<code>触发生效</code> |
| 的均为支持热修改的配置参数。</p> <p>触发方式：客户端发送<code>load configuration</code>命令至 IoTDB |
| Server，客户端的使用方式详见 <a href="https://iotdb.apache.org/zh/UserGuide/Master/CLI/Command-Line-Interface.html" target="_blank" rel="noopener noreferrer">SQL 命令行终端（CLI）<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></p> <h2 id="环境配置项"><a href="#环境配置项" class="header-anchor">#</a> 环境配置项</h2> <p>环境配置项主要用于对 IoTDB Server 运行的 Java 环境相关参数进行配置，如 JVM 相关配置。IoTDB Server 启动时，此部分配置会被传给 JVM。用户可以通过查看 <code>iotdb-env.sh</code> |
| （或<code>iotdb-env.bat</code>) 文件查看环境配置项内容。详细配置项说明如下：</p> <ul><li>JMX_LOCAL</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">JMX_LOCAL</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">JMX 监控模式，配置为 true 表示仅允许本地监控，设置为 false 的时候表示允许远程监控。如想在本地通过网络连接JMX Service，比如nodeTool.sh会尝试连接127.0.0.1:31999，请将JMX_LOCAL设置为false。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">枚举 String : “true”, “false”</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>JMX_PORT</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">JMX_PORT</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">JMX 监听端口。请确认该端口是不是系统保留端口并且未被占用。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Short Int: [0,65535]</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">31999</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>MAX_HEAP_SIZE</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">MAX_HEAP_SIZE</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">IoTDB 启动时能使用的最大堆内存大小。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">取决于操作系统和机器配置。在 Linux 或 MacOS 系统下默认为机器内存的四分之一。在 Windows 系统下，32 位系统的默认值是 512M，64 位系统默认值是 2G。</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>HEAP_NEWSIZE</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">HEAP_NEWSIZE</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">IoTDB 启动时能使用的最小堆内存大小。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">取决于操作系统和机器配置。在 Linux 或 MacOS 系统下默认值为机器 CPU 核数乘以 100M 的值与 MAX_HEAP_SIZE 四分之一这二者的最小值。在 Windows 系统下，32 位系统的默认值是 512M，64 位系统默认值是 2G。</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h2 id="系统配置项"><a href="#系统配置项" class="header-anchor">#</a> 系统配置项</h2> <p>系统配置项是 IoTDB Server 运行的核心配置，它主要用于设置 IoTDB Server 文件层和引擎层的参数，便于用户根据自身需求调整 Server |
| 的相关配置，以达到较好的性能表现。系统配置项可分为两大模块：文件层配置项和引擎层配置项。用户可以通过<code>iotdb-engine.properties</code>, 文件查看和修改两种配置项的内容。在 0.7.0 版本中字符串类型的配置项大小写敏感。</p> <h3 id="rpc配置"><a href="#rpc配置" class="header-anchor">#</a> RPC配置</h3> <ul><li>rpc_address</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">rpc_address</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">rpc地址</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">0.0.0.0</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>rpc_port</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">rpc_port</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">jdbc 服务监听端口。请确认该端口不是系统保留端口并且未被占用。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Short Int : [0,65535]</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">6667</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>rpc_thrift_compression_enable</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">rpc_thrift_compression_enable</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否启用 thrift 的压缩机制。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>rpc_advanced_compression_enable</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">rpc_advanced_compression_enable</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否启用 thrift 的自定制压缩机制。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>rpc_max_concurrent_client_num</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">rpc_max_concurrent_client_num</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">最大连接数。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Short Int : [0,65535]</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">65535</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>thrift_max_frame_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">thrift_max_frame_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">RPC 请求/响应的最大字节数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">long</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">536870912 （默认值512MB，应大于等于 512 * 1024 * 1024)</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>thrift_init_buffer_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">thrift_init_buffer_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">字节数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">long</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1024</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="influxdb-协议适配器配置"><a href="#influxdb-协议适配器配置" class="header-anchor">#</a> InfluxDB 协议适配器配置</h3> <ul><li>enable_influxdb_rpc_service</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_influxdb_rpc_service</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启InfluxDB RPC service</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>influxdb_rpc_port</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">influxdb_rpc_port</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">influxdb rpc service占用端口</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">INT32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">8086</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="写前日志配置"><a href="#写前日志配置" class="header-anchor">#</a> 写前日志配置</h3> <ul><li>enable_wal</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_wal</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启写前日志，默认值为 true 表示开启，配置成 false 表示关闭</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>enable_discard_out_of_order_data</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_discard_out_of_order_data</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否丢弃乱序数据，默认值为 false 表示关闭</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>flush_wal_threshold</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">flush_wal_threshold</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">写前日志的条数达到该值之后，持久化到磁盘，有可能丢失至多 flush_wal_threshold 个操作</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">10000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>force_wal_period_in_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">force_wal_period_in_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">写前日志定期持久化到磁盘的周期，单位毫秒，有可能丢失至多 force_wal_period_in_ms 毫秒的操作。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">100</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <h3 id="目录配置"><a href="#目录配置" class="header-anchor">#</a> 目录配置</h3> <ul><li>system_dir</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">system_dir</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">IoTDB 元数据存储路径，默认存放在和 sbin 目录同级的 data 目录下。相对路径的起始目录与操作系统相关，建议使用绝对路径。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">data/system（Windows：data\system）</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>data_dirs</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">data_dirs</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">IoTDB 数据存储路径，默认存放在和 sbin 目录同级的 data 目录下。相对路径的起始目录与操作系统相关，建议使用绝对路径。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">data/data（Windows：data\data）</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>multi_dir_strategy</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">multi_dir_strategy</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">IoTDB 在 tsfile_dir 中为 TsFile 选择目录时采用的策略。可使用简单类名或类名全称。系统提供以下三种策略：<br>1. SequenceStrategy：IoTDB 按顺序从 tsfile_dir 中选择目录，依次遍历 tsfile_dir 中的所有目录，并不断轮循；<br>2. MaxDiskUsableSpaceFirstStrategy：IoTDB 优先选择 tsfile_dir 中对应磁盘空余空间最大的目录；<br>3. MinFolderOccupiedSpaceFirstStrategy：IoTDB 优先选择 tsfile_dir 中已使用空间最小的目录；<br>4. UserDfineStrategyPackage（用户自定义策略）<br>您可以通过以下方法完成用户自定义策略：<br>1. 继承 cn.edu.tsinghua.iotdb.conf.directories.strategy.DirectoryStrategy 类并实现自身的 Strategy 方法；<br>2. 将实现的类的完整类名（包名加类名，UserDfineStrategyPackage）填写到该配置项；<br>3. 将该类 jar 包添加到工程中。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">MaxDiskUsableSpaceFirstStrategy</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>wal_dir</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">wal_dir</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">IoTDB 写前日志存储路径，默认存放在和 sbin 目录同级的 data 目录下。相对路径的起始目录与操作系统相关，建议使用绝对路径。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">data/wal（Windows：data\wal）</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>tsfile_storage_fs</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">tsfile_storage_fs</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">Tsfile 和相关数据文件的存储文件系统。目前支持 LOCAL（本地文件系统）和 HDFS 两种</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">LOCAL</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table> <ul><li>core_site_path</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">core_site_path</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在 Tsfile 和相关数据文件存储到 HDFS 的情况下用于配置 core-site.xml 的绝对路径</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">/etc/hadoop/conf/core-site.xml</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>hdfs_site_path</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">hdfs_site_path</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在 Tsfile 和相关数据文件存储到 HDFS 的情况下用于配置 hdfs-site.xml 的绝对路径</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">/etc/hadoop/conf/hdfs-site.xml</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>hdfs_ip</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">hdfs_ip</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在 Tsfile 和相关数据文件存储到 HDFS 的情况下用于配置 HDFS 的 IP。<strong>如果配置了多于 1 个 hdfs_ip，则表明启用了 Hadoop HA</strong></td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">localhost</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>hdfs_port</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">hdfs_port</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在 Tsfile 和相关数据文件存储到 HDFS 的情况下用于配置 HDFS 的端口</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">9000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>dfs_nameservices</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">hdfs_nameservices</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在使用 Hadoop HA 的情况下用于配置 HDFS 的 nameservices</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">hdfsnamespace</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>dfs_ha_namenodes</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">hdfs_ha_namenodes</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在使用 Hadoop HA 的情况下用于配置 HDFS 的 nameservices 下的 namenodes</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">nn1,nn2</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>dfs_ha_automatic_failover_enabled</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">dfs_ha_automatic_failover_enabled</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在使用 Hadoop HA 的情况下用于配置是否使用失败自动切换</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>dfs_client_failover_proxy_provider</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">dfs_client_failover_proxy_provider</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在使用 Hadoop HA 且使用失败自动切换的情况下配置失败自动切换的实现方式</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>hdfs_use_kerberos</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">hdfs_use_kerberos</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否使用 kerberos 验证访问 hdfs</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>kerberos_keytab_file_path</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">kerberos_keytab_file_path</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">kerberos keytab file 的完整路径</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">/path</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>kerberos_principal</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">kerberos_principal</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">Kerberos 认证原则</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">your principal</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="存储引擎配置"><a href="#存储引擎配置" class="header-anchor">#</a> 存储引擎配置</h3> <ul><li>timestamp_precision</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">timestamp_precision</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">时间戳精度，支持 ms、us、ns</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">ms</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>default_ttl</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">default_ttl</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">数据保留时间，会丢弃 now()-default_ttl 之前的数据，单位 ms</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">long</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">36000000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>wal_buffer_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">wal_buffer_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">写前日志的 buffer 大小</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">16777216</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>seq_tsfile_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">seq_tsfile_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">每个顺序tsfile大小,单位：byte</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>unseq_tsfile_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">unseq_tsfile_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">每个无序 tsfile 大小,单位：byte</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>mlog_buffer_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">mlog_buffer_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">mlog 的 buffer 大小</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1048576</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>sync_mlog_period_in_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">sync_mlog_period_in_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">mlog定期刷新到磁盘的周期，单位毫秒。如果该参数为0，则表示每次对元数据的更新操作都会被立即写到磁盘上。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int64</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">100</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>memtable_size_threshold</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">memtable_size_threshold</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">内存缓冲区 memtable 阈值</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Long</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1073741824</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">enable_mem_control 为 false 时生效、重启服务生效</td></tr></tbody></table> <ul><li>enable_timed_flush_seq_memtable</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_timed_flush_seq_memtable</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启定时刷盘顺序 memtable</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>seq_memtable_flush_interval_in_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">seq_memtable_flush_interval_in_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">当 memTable 的创建时间小于当前时间减去该值时，该 memtable 需要被刷盘</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">3600000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>seq_memtable_flush_check_interval_in_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">seq_memtable_flush_check_interval_in_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">检查顺序 memtable 是否需要刷盘的时间间隔</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">600000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>enable_timed_flush_unseq_memtable</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_timed_flush_unseq_memtable</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启定时刷新乱序 memtable</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>unseq_memtable_flush_interval_in_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">unseq_memtable_flush_interval_in_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">当 memTable 的创建时间小于当前时间减去该值时，该 memtable 需要被刷盘</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">3600000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>unseq_memtable_flush_check_interval_in_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">unseq_memtable_flush_check_interval_in_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">检查乱序 memtable 是否需要刷盘的时间间隔</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">600000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>enable_timed_close_tsfile</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_timed_close_tsfile</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启定时关闭 tsfile</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>close_tsfile_interval_after_flushing_in_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">close_tsfile_interval_after_flushing_in_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">当 tsfile 的上一个 memtable 刷盘时间小于当前时间减去该值且当前工作 memtable 为空时， 该 tsfile 需要被关闭</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">3600000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>close_tsfile_check_interval_in_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">close_tsfile_check_interval_in_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">检查 tsfile 是否需要关闭的时间间隔</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">600000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>avg_series_point_number_threshold</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">avg_series_point_number_threshold</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">内存中平均每个时间序列点数最大值，达到触发 flush</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">100000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>concurrent_flush_thread</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">concurrent_flush_thread</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">当 IoTDB 将内存中的数据写入磁盘时，最多启动多少个线程来执行该操作。如果该值小于等于 0，那么采用机器所安装的 CPU 核的数量。默认值为 0。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">0</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>concurrent_query_thread</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">concurrent_query_thread</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">当 IoTDB 对内存中的数据进行查询时，最多启动多少个线程来执行该操作。如果该值小于等于 0，那么采用机器所安装的 CPU 核的数量。默认值为 16。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">16</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>concurrent_sub_rawQuery_thread</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">concurrent_sub_rawQuery_thread</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">原始数据查询时，最多启动多少个线程来执行该操作。如果设置小于等于 0，会采用机器 CPU 核数。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">8</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>raw_query_blocking_queue_capacity</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">raw_query_blocking_queue_capacity</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">原始数据查询中，读任务的阻塞队列长度。默认值为 5。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">5</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>chunk_buffer_pool_enable</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">chunk_buffer_pool_enable</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在将 memtable 序列化为内存中的字节时，是否开启由 IoTDB 而不是 JVM 接管内存管理，默认关闭。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>batch_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">batch_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">服务器中每次迭代的数据量（数据条目，即不同时间戳的数量。）</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">100000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>tag_attribute_total_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">tag_attribute_total_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">每个时间序列标签和属性的最大持久化字节数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">700</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table> <ul><li>tag_attribute_flush_interval</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">tag_attribute_flush_interval</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">标签和属性记录的间隔数，达到此记录数量时将强制刷盘</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table> <ul><li>enable_partial_insert</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_partial_insert</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在一次 insert 请求中，如果部分测点写入失败，是否继续写入其他测点。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>enable_mtree_snapshot</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_mtree_snapshot</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否启用 MTree snapshot。 从 0.11.0 开始默认为 false。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>mtree_snapshot_interval</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">mtree_snapshot_interval</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">创建 MTree snapshot 时至少累积的 mlog 日志行数。单位为日志行数。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">100000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>mtree_snapshot_threhold_time</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">mtree_snapshot_threhold_time</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">MTree 修改的阈值间隔时间，若最后一次修改时间小于这个阈值，则不会创建 MTree snapshot。 单位：秒。 默认值：1 小时（3600 秒）</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">3600</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="内存控制配置"><a href="#内存控制配置" class="header-anchor">#</a> 内存控制配置</h3> <ul><li>enable_mem_control</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_mem_control</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">开启内存控制，避免爆内存</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>write_read_schema_free_memory_proportion</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">write_read_schema_free_memory_proportion</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">读写内存分配比率。 参数形式为a : b : c : d，其中a、b、c、d为整数。如“1:1:1:1”、“6:2:1:1”，如果你的写入压力大而读取压力小，请调整为“6:1:1:2”</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">4:3:1:2</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>primary_array_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">primary_array_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">数组池中的原始数组大小（每个数组的长度）</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">32</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>flush_proportion</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">flush_proportion</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">调用flush disk的写入内存比例，默认0.4,若有极高的写入负载力（比如batch=1000），可以设置为低于默认值，比如0.2</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Double</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">0.4</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>time_index_memory_proportion</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">time_index_memory_proportion</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">分配给读 timeIndex 的内存占比</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Double</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">0.2</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>buffered_arrays_memory_proportion</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">buffered_arrays_memory_proportion</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">为缓冲数组分配的写入内存比例，默认为0.6</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Double</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">0.6</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>reject_proportion</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">reject_proportion</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">拒绝插入的写入内存比例，默认0.8，若有极高的写入负载力（比如batch=1000）并且物理内存足够大，它可以设置为高于默认值，如0.9</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Double</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">0.8</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>storage_group_report_threshold</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">storage_group_report_threshold</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">如果存储组的内存（以字节byte为单位）增加超过此阈值，则向系统报告。默认值为16MB</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">16777216</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>max_deduplicated_path_num</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">max_deduplicated_path_num</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在一次查询中，允许最大重复路径的数据量，这只是一个建议值，实际限制是这个默认值和计算值的之间</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>check_period_when_insert_blocked</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">check_period_when_insert_blocked</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">当插入被拒绝时，等待时间（以毫秒为单位）去再次检查系统，默认为50。若插入被拒绝，读取负载低，可以设置大一些。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">50</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>max_waiting_time_when_insert_blocked</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">max_waiting_time_when_insert_blocked</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">当插入的等待时间（以毫秒为单位）超过此值时，抛出异常。默认为10000。若插入被拒绝，读取负载低，可以设置大一些。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">10000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>estimated_series_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">estimated_series_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在Mtree中一个时间序列的评估元数据大小（以字节byte为单位）。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">300</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>io_task_queue_size_for_flushing</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">io_task_queue_size_for_flushing</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">ioTaskQueue 的大小。默认值为10。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">10</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>schema_query_fetch_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">schema_query_fetch_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">默认的一次元数据查询返回的最大条目数，例如show timeseries。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">10000000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="升级配置"><a href="#升级配置" class="header-anchor">#</a> 升级配置</h3> <ul><li>update_thread_num</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">update_thread_num</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">当存在旧版本（V0.9.x/v1）数据时，会设置多少线程来执行升级任务，默认为1。版本小于等于V0.X时设置为1。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="查询配置"><a href="#查询配置" class="header-anchor">#</a> 查询配置</h3> <ul><li>default_fill_interval</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">default_fill_interval</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">填充查询中使用的默认时间段，默认-1表示无限过去时间，以毫秒ms为单位</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">-1</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>group_by_fill_cache_size_in_mb</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">group_by_fill_cache_size_in_mb</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">填充查询中使用的缓存大小，单位是MB</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Float</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1.0</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="合并配置"><a href="#合并配置" class="header-anchor">#</a> 合并配置</h3> <ul><li>enable_seq_space_compaction</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_seq_space_compaction</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">顺序空间内合并，开启顺序文件之间的合并</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>enable_unseq_space_compaction</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_unseq_space_compaction</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">乱序空间内合并，开启乱序文件之间的合并</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>enable_cross_space_compaction</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_cross_space_compaction</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">跨空间合并，开启将乱序文件合并到顺序文件中</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>cross_compaction_strategy</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">cross_compaction_strategy</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">跨空间合并的策略</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">rewrite_compaction</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>inner_compaction_strategy</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">cross_compaction_strategy</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">空间内合并的策略</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">size_tiered_compaction</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>compaction_priority</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">compaction_priority</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">合并时的优先级，BALANCE 各种合并平等，INNER_CROSS 优先进行顺序文件和顺序文件或乱序文件和乱序文件的合并，CROSS_INNER 优先将乱序文件合并到顺序文件中</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">BALANCE</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>target_compaction_file_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">target_compaction_file_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">空间内合并的目标文件大小</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int64</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1073741824</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>target_chunk_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">target_chunk_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">合并时 Chunk 的目标大小</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int64</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1048576</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>target_chunk_point_num</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">target_chunk_point_num</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">合并时 Chunk 的目标点数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">100000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>chunk_size_lower_bound_in_compaction</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">chunk_size_lower_bound_in_compaction</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">合并时源 Chunk 的大小小于这个值，将被解开成点进行合并</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int64</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">128</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>chunk_point_num_lower_bound_in_compaction</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">chunk_point_num_lower_bound_in_compaction</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">合并时源 Chunk 的点数小于这个值，将被解开成点进行合并</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">100</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>max_inner_compaction_candidate_file_num</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">max_inner_compaction_candidate_file_num</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">空间内合并中一次合并最多参与的文件数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">30</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>max_cross_compaction_candidate_file_num</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">max_cross_compaction_candidate_file_num</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">跨空间合并中一次合并最多参与的文件数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>cross_compaction_file_selection_time_budget</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">cross_compaction_file_selection_time_budget</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">若一个合并文件选择运行的时间超过这个时间，它将结束，并且当前的文件合并选择将用作为最终选择。当时间小于0 时，则表示时间是无边界的。单位：ms。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">30000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>cross_compaction_memory_budget</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">cross_compaction_memory_budget</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">一个合并任务可以使用多少内存（以字节为单位），默认为最大JVM内存的10%。这只是一个粗略的估计，从一个比较小的值开始，避免OOM。每个新的合并线程可能会占用这样的内存，所以merge_thread_num * merge_memory_budget是合并的预估总内存。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">2147483648</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>concurrent_compaction_thread</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">concurrent_compaction_thread</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">执行合并任务的线程数目</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">10</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>compaction_schedule_interval_in_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">compaction_schedule_interval_in_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">合并调度的时间间隔</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int64</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">60000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>compaction_submission_interval_in_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">compaction_submission_interval_in_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">合并任务提交的间隔</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int64</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">60000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>compaction_write_throughput_mb_per_sec</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">compaction_write_throughput_mb_per_sec</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">每秒可达到的写入吞吐量合并限制。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">16</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="插入配置"><a href="#插入配置" class="header-anchor">#</a> 插入配置</h3> <ul><li>insert_multi_tablet_enable_multithreading_column_threshold</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">insert_multi_tablet_enable_multithreading_column_threshold</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">插入时启用多线程插入列数的阈值</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">10</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>query_timeout_threshold</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">query_timeout_threshold</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">查询的最大执行时间。单位：毫秒。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">60000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="元数据缓存配置"><a href="#元数据缓存配置" class="header-anchor">#</a> 元数据缓存配置</h3> <ul><li>meta_data_cache_enable</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">meta_data_cache_enable</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否缓存元数据Chunk Metadata 和 TimeSeries Metadata）。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>chunk_timeseriesmeta_free_memory_proportion</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">chunk_timeseriesmeta_free_memory_proportion</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">读取内存分配比例，BloomFilterCache、ChunkCache、TimeseriesMetadataCache、数据集查询的内存和可用内存的查询。参数形式为a : b : c : d : e，其中a、b、c、d、e为整数。 例如“1 : 1 : 1 : 1 : 1” ，“1 : 100 : 200 : 300 : 400” 。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1 : 100 : 200 : 300 : 400</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>metadata_node_cache_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">metadata_node_cache_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">Manager的缓存大小。所有路径检查和将具有相应路径的MManager中的TSDataType的缓存，都将被用作提高写入速度。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">300000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="最新点缓存配置"><a href="#最新点缓存配置" class="header-anchor">#</a> 最新点缓存配置</h3> <ul><li>enable_last_stat</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_last_cache</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启最新点缓存</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="统计监控器配置"><a href="#统计监控器配置" class="header-anchor">#</a> 统计监控器配置</h3> <ul><li>enable_stat_monitor</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_stat_monitor</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">选择是否启动后台统计功能</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>enable_monitor_series_write</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_monitor_series_write</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启写入服务监控的时间序列</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="wal-直接缓冲池配置"><a href="#wal-直接缓冲池配置" class="header-anchor">#</a> WAL 直接缓冲池配置</h3> <ul><li>wal_pool_trim_interval_ms</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">wal_pool_trim_interval_ms</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">缩短日志池间隔时间，单位：毫秒ms</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">10000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>max_wal_bytebuffer_num_for_each_partition</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">max_wal_bytebuffer_num_for_each_partition</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">每个时间分区可以分配的最大日志字节缓冲区数，如果没有乱序数据可以设置为4。应该是偶数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">6</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="外部排序配置"><a href="#外部排序配置" class="header-anchor">#</a> 外部排序配置</h3> <ul><li>enable_external_sort</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_external_sort</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启外部排序功能</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>external_sort_threshold</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">external_sort_threshold</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">单个时间序列的最大同时块读取数。若同时chunk读取的数量大于external_sort_threshold，则使用外部排序。当external_sort_threshold增加时，内存中同时排序的chunk数量可能会增加，这会占用更多的内存；external_sort_threshold 减小时，触发外部排序会增加耗时。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="同步服务器配置"><a href="#同步服务器配置" class="header-anchor">#</a> 同步服务器配置</h3> <ul><li>is_sync_enable</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">is_sync_enable</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启同步服务功能</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>sync_server_port</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">sync_server_port</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">同步服务器端口进行监听</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">5555</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>ip_white_list</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">ip_white_list</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">同步客户端的白名单。请用网段形式表示IP范围，例如：192.168.0.0/16，若有多个IP段，请用逗号隔开，默认是允许所有IP同步</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">0.0.0.0/0</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="性能统计配置"><a href="#性能统计配置" class="header-anchor">#</a> 性能统计配置</h3> <ul><li>enable_performance_stat</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_performance_stat</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否启用子模块的性能状态</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>tracing_dir</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">tracing_dir</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">取消注释用以下字段来配置 tracing 根目录。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">data/tracing(Windows:data\tracing)</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="水印模块配置"><a href="#水印模块配置" class="header-anchor">#</a> 水印模块配置</h3> <ul><li>watermark_module_opened</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">watermark_module_opened</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启水印水印嵌入功能</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">true or false</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>watermark_secret_key</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">watermark_secret_key</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">水印嵌入功能秘钥</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">IoTDB * 2019@Beijing</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>watermark_bit_string</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">watermark_bit_string</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">水印比特字符串</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">100101110100</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>watermark_method</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">watermark_method</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">水印嵌入方法</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">GroupBasedLSBMethod(embed_row_cycle=2,embed_lsb_num=5)</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="数据类型自动推断"><a href="#数据类型自动推断" class="header-anchor">#</a> 数据类型自动推断</h3> <ul><li>enable_auto_create_schema</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_auto_create_schema</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">当写入的序列不存在时，是否自动创建序列</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">true or false</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">true</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>default_storage_group_level</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">default_storage_group_level</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">当写入的数据不存在且自动创建序列时，若需要创建相应的存储组，将序列路径的哪一层当做存储组。例如，如果我们接到一个新序列 root.sg0.d1.s2, 并且 level=1， 那么 root.sg0 被视为存储组（因为 root 是 level 0 层）</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>boolean_string_infer_type</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">boolean_string_infer_type</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">"true" 或者 "false" 字符串被推断的数据类型</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">BOOLEAN 或者 TEXT</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">BOOLEAN</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>integer_string_infer_type</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">integer_string_infer_type</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">整型字符串推断的数据类型</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">INT32, INT64, FLOAT, DOUBLE, TEXT</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">FLOAT</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>long_string_infer_type</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">long_string_infer_type</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">大于 2 ^ 24 的整形字符串被推断的数据类型</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">DOUBLE, FLOAT or TEXT</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">DOUBLE</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>floating_string_infer_type</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">floating_string_infer_type</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">"6.7"等字符串被推断的数据类型</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">DOUBLE, FLOAT or TEXT</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">FLOAT</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>nan_string_infer_type</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">nan_string_infer_type</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">"NaN" 字符串被推断的数据类型</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">DOUBLE, FLOAT or TEXT</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">DOUBLE</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>default_boolean_encoding</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">default_boolean_encoding</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">BOOLEAN 类型编码格式</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">PLAIN, RLE</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">RLE</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>default_int32_encoding</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">default_int32_encoding</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">int32 类型编码格式</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">PLAIN, RLE, TS_2DIFF, REGULAR, GORILLA</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">RLE</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>default_int64_encoding</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">default_int64_encoding</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">int64 类型编码格式</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">PLAIN, RLE, TS_2DIFF, REGULAR, GORILLA</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">RLE</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>default_float_encoding</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">default_float_encoding</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">float 类型编码格式</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">PLAIN, RLE, TS_2DIFF, GORILLA</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">GORILLA</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>default_double_encoding</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">default_double_encoding</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">double 类型编码格式</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">PLAIN, RLE, TS_2DIFF, GORILLA</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">GORILLA</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>default_text_encoding</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">default_text_encoding</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">text 类型编码格式</td></tr> <tr><td style="text-align:center;">取值</td> <td style="text-align:left;">PLAIN</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">PLAIN</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="文件层配置"><a href="#文件层配置" class="header-anchor">#</a> 文件层配置</h3> <ul><li>group_size_in_byte</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">group_size_in_byte</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">每次将内存中的数据写入到磁盘时的最大写入字节数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">134217728</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>page_size_in_byte</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">page_size_in_byte</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">内存中每个列写出时，写成的单页最大的大小，单位为字节</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">65536</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>max_number_of_points_in_page</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">max_number_of_points_in_page</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">一个页中最多包含的数据点（时间戳-值的二元组）数量</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1048576</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>max_string_length</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">max_string_length</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">针对字符串类型的数据，单个字符串最大长度，单位为字符</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">128</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>float_precision</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">float_precision</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">浮点数精度，为小数点后数字的位数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">默认为 2 位。注意：32 位浮点数的十进制精度为 7 位，64 位浮点数的十进制精度为 15 位。如果设置超过机器精度将没有实际意义。</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>time_encoder</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">time_encoder</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">时间列编码方式</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">枚举 String: “TS_2DIFF”,“PLAIN”,“RLE”</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">TS_2DIFF</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>value_encoder</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">value_encoder</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">value 列编码方式</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">枚举 String: “TS_2DIFF”,“PLAIN”,“RLE”</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">PLAIN</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>compressor</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">compressor</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">数据压缩方法</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">枚举 String : “UNCOMPRESSED”, “SNAPPY”, “LZ4”</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">SNAPPY</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>max_degree_of_index_node</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">max_degree_of_index_node</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">元数据索引树的最大度（即每个节点的最大子节点个数）。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">256</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table> <ul><li>frequency_interval_in_minute</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">frequency_interval_in_minute</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">计算查询频率的时间间隔（以分钟为单位）。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>slow_query_threshold</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">slow_query_threshold</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">慢查询的时间成本（毫秒ms）阈值。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">5000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <h3 id="mqtt代理配置"><a href="#mqtt代理配置" class="header-anchor">#</a> MQTT代理配置</h3> <ul><li>enable_mqtt_service</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_mqtt_service。</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启MQTT服务</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>mqtt_host</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">mqtt_host</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">MQTT服务绑定的host。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">0.0.0.0</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>mqtt_port</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">mqtt_port</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">MQTT服务绑定的port。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1883</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>mqtt_handler_pool_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">mqtt_handler_pool_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">用于处理MQTT消息的处理程序池大小。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>mqtt_payload_formatter</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">mqtt_payload_formatter</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">MQTT消息有效负载格式化程序。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">json</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <ul><li>mqtt_max_message_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">mqtt_max_message_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">MQTT消息的最大长度（以字节为单位）。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1048576</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <h3 id="授权配置"><a href="#授权配置" class="header-anchor">#</a> 授权配置</h3> <ul><li>authorizer_provider_class</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">authorizer_provider_class</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">权限服务的类名</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">org.apache.iotdb.db.auth.authorizer.LocalFileAuthorizer</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr> <tr><td style="text-align:center;">其他可选值</td> <td style="text-align:left;">org.apache.iotdb.db.auth.authorizer.OpenIdAuthorizer</td></tr></tbody></table> <ul><li>openID_url</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">openID_url</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">openID 服务器地址 （当 OpenIdAuthorizer 被启用时必须设定）</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String（一个 http 地址）</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">无</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="udf查询配置"><a href="#udf查询配置" class="header-anchor">#</a> UDF查询配置</h3> <ul><li>udf_initial_byte_array_length_for_memory_control</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">udf_initial_byte_array_length_for_memory_control</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">用于评估UDF查询中文本字段的内存使用情况。建议将此值设置为略大于所有文本的平均长度记录。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">48</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>udf_memory_budget_in_mb</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">udf_memory_budget_in_mb</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">在一个UDF查询中使用多少内存（以 MB 为单位）。上限为已分配内存的 20% 用于读取。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Float</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">30.0</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>udf_reader_transformer_collector_memory_proportion</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">udf_reader_transformer_collector_memory_proportion</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">UDF内存分配比例。参数形式为a : b : c，其中a、b、c为整数。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1:1:1</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>udf_root_dir</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">udf_root_dir</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">取消注释用以下字段来配置udf根目录。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">ext/udf(Windows:ext\udf)</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="索引配置"><a href="#索引配置" class="header-anchor">#</a> 索引配置</h3> <ul><li>index_root_dir</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">index_root_dir</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">取消注释用以下字段来配置索引根目录。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">data/index(Windows:data\index)</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>enable_index</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_index</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否启用索引。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>concurrent_index_build_thread</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">concurrent_index_build_thread</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">有多少线程可以同时构建索引。当<=0时，使用CPU内核数。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">0</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>default_index_window_range</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">default_index_window_range</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">索引框架中用于子序列匹配的滑动窗口的默认大小。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">10</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>index_buffer_size</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">index_buffer_size</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">索引处理器的缓冲区参数。</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">134217728</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>enable_partition</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">enable_partition</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">是否开启将数据按时间分区存储的功能，如果关闭，所有数据都属于分区 0 (不建议开启此功能。 如果打开，请计算合适的 concurrent_writing_time_partition 和 wal_buffer_size)</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Boolean</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">false</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table> <ul><li>partition_interval</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">partition_interval</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">用于存储组分区的时间段长度，用户指定的存储组下会使用该时间段进行分区，单位：秒</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int64</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">604800</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table> <ul><li>virtual_storage_group_num</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">virtual_storage_group_num</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">每一个用户定义存储组下虚拟存储组的数量, 虚拟存储组是内存中写入的并行单位，每一个虚拟存储组内的写入请求是串行的，推荐值为： [virtual storage group number] = [CPU core number] / [user-defined storage group number]</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">INT32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table> <ul><li>concurrent_writing_time_partition</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">concurrent_writing_time_partition</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">最大可同时写入的时间分区个数，默认500个分区</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int64</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">500</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>admin_name</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">admin_name</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">管理员用户名，默认为root</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">root</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table> <ul><li>admin_password</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">admin_password</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">管理员密码，默认为root</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">String</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">root</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">仅允许在第一次启动服务前修改</td></tr></tbody></table> <h3 id="select-into配置"><a href="#select-into配置" class="header-anchor">#</a> SELECT-INTO配置</h3> <ul><li>select_into_insert_tablet_plan_row_limit</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">select_into_insert_tablet_plan_row_limit</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">执行 select-into 语句时，一个 insert-tablet-plan 中可以处理的最大行数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">10000</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">触发生效</td></tr></tbody></table> <h3 id="触发器配置"><a href="#触发器配置" class="header-anchor">#</a> 触发器配置</h3> <ul><li>concurrent_window_evaluation_thread</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">concurrent_window_evaluation_thread</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">窗口计算线程池的默认线程数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">CPU核数</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>max_pending_window_evaluation_tasks</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">max_pending_window_evaluation_tasks</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">最多允许堆积的窗口计算任务</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">64</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h3 id="连续查询配置"><a href="#连续查询配置" class="header-anchor">#</a> 连续查询配置</h3> <ul><li>continuous_query_execution_thread</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">continuous_query_execution_thread</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">执行连续查询任务的线程池的线程数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">max(1, CPU 核数 / 2)</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>max_pending_continuous_query_tasks</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">max_pending_continuous_query_tasks</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">队列中连续查询最大任务堆积数</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">Int32</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">64</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <ul><li>continuous_query_min_every_interval</li></ul> <table><thead><tr><th style="text-align:center;">名字</th> <th style="text-align:left;">continuous_query_min_every_interval</th></tr></thead> <tbody><tr><td style="text-align:center;">描述</td> <td style="text-align:left;">连续查询执行时间间隔的最小值</td></tr> <tr><td style="text-align:center;">类型</td> <td style="text-align:left;">duration</td></tr> <tr><td style="text-align:center;">默认值</td> <td style="text-align:left;">1s</td></tr> <tr><td style="text-align:center;">改后生效方式</td> <td style="text-align:left;">重启服务生效</td></tr></tbody></table> <h2 id="开启-gc-日志"><a href="#开启-gc-日志" class="header-anchor">#</a> 开启 GC 日志</h2> <p>GC 日志默认是关闭的。为了性能调优，用户可能会需要收集 GC 信息。 |
| 若要打开 GC 日志，则需要在启动 IoTDB Server 的时候加上"printgc"参数：</p> <div class="language-bash line-numbers-mode"><pre class="language-bash"><code><span class="token function">nohup</span> sbin/start-server.sh printgc <span class="token operator">></span>/dev/null <span class="token operator"><span class="token file-descriptor important">2</span>></span><span class="token file-descriptor important">&1</span> <span class="token operator">&</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>或者</p> <div class="language-bash line-numbers-mode"><pre class="language-bash"><code>sbin<span class="token punctuation">\</span>start-server.bat printgc |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>GC 日志会被存储在<code>IOTDB_HOME/logs/gc.log</code>. 至多会存储 10 个 gc.log 文件，每个文件最多 10MB。</p></div> <div class="page-nav"><p class="inner"><span class="prev"> |
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