import{_ as e,o as n,c as o,a as i,f as t}from"./app-u0F7ej3R.js";const a={},r=t(`<h1 id="慢查询管理" tabindex="-1"><a class="header-anchor" href="#慢查询管理" aria-hidden="true">#</a> 慢查询管理</h1><p>IoTDB 会将慢查询输出到单独的日志文件 log_datanode_slow_sql.log 中，并记录其执行耗时。</p><h2 id="配置慢查询的阈值" tabindex="-1"><a class="header-anchor" href="#配置慢查询的阈值" aria-hidden="true">#</a> 配置慢查询的阈值</h2><p>IoTDB 在 <code>iotdb-common.properties</code> 提供了 <code>slow_query_threshold</code> 配置项，单位是毫秒，默认是30秒，超过此参数指定的阈值，便会被判断为慢查询，待其查询执行结束后，将其记录在 log_datanode_slow_sql.log 中。</p><h2 id="慢查询日志示例" tabindex="-1"><a class="header-anchor" href="#慢查询日志示例" aria-hidden="true">#</a> 慢查询日志示例</h2><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>2023-07-31 20:15:00,533 [pool-27-IoTDB-ClientRPC-Processor-1$20230731_121500_00003_1] INFO  o.a.i.d.q.p.Coordinator:225 - Cost: 42593 ms, sql is select * from root.db.** 
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