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       </script><title>慢查询管理 | IoTDB Website</title><meta name="description" content="慢查询管理 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。 配置慢查询的阈值 IoTDB 在 iotdb-common.properties 提供了 slow_query_threshold 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...">
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class="vp-toc-header">此页内容<button type="button" class="print-button" title="打印"><svg xmlns="http://www.w3.org/2000/svg" class="icon print-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="print icon"><path d="M819.2 364.8h-44.8V128c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v236.8h-44.8C145.067 364.8 96 413.867 96 473.6v192c0 59.733 49.067 108.8 108.8 108.8h44.8V896c0 17.067 14.933 32 32 32h460.8c17.067 0 32-14.933 32-32V774.4h44.8c59.733 0 108.8-49.067 108.8-108.8v-192c0-59.733-49.067-108.8-108.8-108.8zM313.6 160h396.8v204.8H313.6V160zm396.8 704H313.6V620.8h396.8V864zM864 665.6c0 25.6-19.2 44.8-44.8 44.8h-44.8V588.8c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v121.6h-44.8c-25.6 0-44.8-19.2-44.8-44.8v-192c0-25.6 19.2-44.8 44.8-44.8h614.4c25.6 0 44.8 19.2 44.8 44.8v192z"></path></svg></button><div class="arrow end"></div></div><div class="vp-toc-wrapper"><ul class="vp-toc-list"><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#配置慢查询的阈值">配置慢查询的阈值</a></li><!----><!--]--><!--[--><li class="vp-toc-item"><a class="route-link vp-toc-link level2" href="#慢查询日志示例">慢查询日志示例</a></li><!----><!--]--></ul><div class="vp-toc-marker" style="top:-1.7rem;"></div></div><!--[--><!----><!--]--></aside></div><!--[--><!----><!--]--><div class="theme-hope-content"><h1 id="慢查询管理" tabindex="-1"><a class="header-anchor" href="#慢查询管理"><span>慢查询管理</span></a></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"><span>配置慢查询的阈值</span></a></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"><span>慢查询日志示例</span></a></h2><div class="language-text line-numbers-mode" data-ext="text" data-title="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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