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<header>Updated: 2021-10-24 02:12:19 CST +08</header>
<main>
<h1 id="prometheus-performance-tuning">Prometheus Performance Tuning</h1>
<h2 id="profiling">Profiling</h2>
<h3 id="overview">Overview</h3>
<p><a href="http://your.prometheus.host:9090/debug/pprof">http://your.prometheus.host:9090/debug/pprof</a></p>
<h3 id="go-profiling">Go Profiling</h3>
<ol>
<li>go pprof <a href="http://your.prometheus.host:9090/debug/pprof/heap">http://your.prometheus.host:9090/debug/pprof/heap</a></li>
<li>go pprof web</li>
</ol>
<h2 id="system">System</h2>
<h3 id="adjust-nofile">Adjust nofile</h3>
<ol>
<li><p>find the current ulimit number of open file</p>
<pre><code class="language-sh">ulimit -a
</code></pre></li>
<li><p>increase open files (file descriptor) limit</p>
<pre><code class="language-sh">ulimit -n 102400
</code></pre></li>
</ol>
<h2 id="startup-flag">Startup Flag</h2>
<p>adjust query flag</p>
<ul>
<li><code>query.timeout</code></li>
<li><code>query.max-samples</code></li>
<li><code>query.max-concurrency</code></li>
</ul>
<h2 id="federation">Federation</h2>
<h2 id="thanos">Thanos</h2>
<h3 id="reference">Reference</h3>
<p><a href="https://stackoverflow.com/a/56142573/4810199">Why does Prometheus consume so much memory?@stackoverflow</a></p>
<gcse:searchresults-only></gcse:searchresults-only>
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