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Update docs for dev
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‎docs/dev/configuration.html‎

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<html lang="en">
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<title>HAProxy version 3.4-dev8-128 - Configuration Manual</title>
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<title>HAProxy version 3.4-dev8-149 - Configuration Manual</title>
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<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
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<a class="list-group-item" href="#cpu_ns_tot">cpu_ns_tot</a>
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<a class="list-group-item" href="#cpu_usage_grp">cpu_usage_grp</a>
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<a class="list-group-item" href="#cpu_usage_proc">cpu_usage_proc</a>
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<a class="list-group-item" href="#cpu_usage_thr">cpu_usage_thr</a>
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<a class="list-group-item" href="#crc32">crc32</a>
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<a class="list-group-item" href="#crc32c">crc32c</a>
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<a class="list-group-item" href="#tfo (Server and default-server options)">tfo (Server and default-server options)</a>
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<a class="list-group-item" href="#tgroup">tgroup</a>
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<a class="list-group-item" href="#thread (Bind options)">thread (Bind options)</a>
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<a class="list-group-item" href="#thread (Fetching samples from internal states)">thread (Fetching samples from internal states)</a>
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You can use <strong>left</strong> and <strong>right</strong> arrow keys to navigate between chapters.<br>
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</p>
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<p class="text-right">
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<small>Converted with <a href="https://github.com/cbonte/haproxy-dconv">haproxy-dconv</a> v<b>0.4.2-15</b> on <b>2026/04/13</b></small>
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<small>Converted with <a href="https://github.com/cbonte/haproxy-dconv">haproxy-dconv</a> v<b>0.4.2-15</b> on <b>2026/04/14</b></small>
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</p>
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<!-- /.sidebar -->
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<div class="text-center">
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<h1><a href="http://www.haproxy.org/" title="HAProxy"><img src="../img/HAProxyCommunityEdition_60px.png?0.4.2-15" /></a></h1>
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<h2>Configuration Manual</h2>
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<p><strong>version 3.4-dev8-128</strong></p>
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<p><strong>version 3.4-dev8-149</strong></p>
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<p>
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2026/04/03<br>
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to recover decent performance. The value may be artificially high due to a
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high cpu_calls count, for example when processing many HTTP chunks, and for
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this reason it is often preferred to log cpu_ns_avg instead.
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</pre><a class="anchor" name="cpu_usage_grp"></a><a class="anchor" name="7-cpu_usage_grp"></a><a class="anchor" name="7.3.2-cpu_usage_grp"></a><a class="anchor" name="cpu_usage_grp (Using ACLs and fetching samples)"></a><a class="anchor" name="cpu_usage_grp (Fetching samples from internal states)"></a><div class="keyword"><b><a class="anchor" name="cpu_usage_grp"></a><a href="#7.3.2-cpu_usage_grp">cpu_usage_grp</a></b> : integer</div><pre class="text">Returns the measured CPU usage over the last polling loop, between 0 and 100,
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averaged over all threads of the current thread group. This can be used for
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troubleshooting and for logging. The measure is extremely volatile but will
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remain accurate for sustained loads as each thread measures it over a few
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tens to hundreds of requests.
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</pre><a class="anchor" name="cpu_usage_proc"></a><a class="anchor" name="7-cpu_usage_proc"></a><a class="anchor" name="7.3.2-cpu_usage_proc"></a><a class="anchor" name="cpu_usage_proc (Using ACLs and fetching samples)"></a><a class="anchor" name="cpu_usage_proc (Fetching samples from internal states)"></a><div class="keyword"><b><a class="anchor" name="cpu_usage_proc"></a><a href="#7.3.2-cpu_usage_proc">cpu_usage_proc</a></b> : integer</div><pre class="text">Returns the measured CPU usage over the last polling loop, between 0 and 100,
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averaged over all running threads. This can be used for troubleshooting and
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for logging. The measure is extremely volatile but will remain accurate for
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sustained loads as each thread measures it over a few tens to hundreds of
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requests. This is 100 minus the value reported in the idle ratio in the stats
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page and in &quot;show info&quot;.
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</pre><a class="anchor" name="cpu_usage_thr"></a><a class="anchor" name="7-cpu_usage_thr"></a><a class="anchor" name="7.3.2-cpu_usage_thr"></a><a class="anchor" name="cpu_usage_thr (Using ACLs and fetching samples)"></a><a class="anchor" name="cpu_usage_thr (Fetching samples from internal states)"></a><div class="keyword"><b><a class="anchor" name="cpu_usage_thr"></a><a href="#7.3.2-cpu_usage_thr">cpu_usage_thr</a></b> : integer</div><pre class="text">Returns the measured CPU usage over the last polling loop, between 0 and 100,
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for the calling thread. This can be used for troubleshooting and for logging.
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The measure is extremely volatile but will remain accurate for sustained
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loads as it is measured over a few tens to hundreds of requests. This is the
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same value as used to decide to enable connection killing on too high
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glitches, or to disable compression. See also &quot;<a href="#tune.glitches.kill.cpu-usage">tune.glitches.kill.cpu-usage</a>&quot;
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and &quot;maxcomcpuusage&quot;.
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</pre><a class="anchor" name="date"></a><a class="anchor" name="7-date"></a><a class="anchor" name="7.3.2-date"></a><a class="anchor" name="date (Using ACLs and fetching samples)"></a><a class="anchor" name="date (Fetching samples from internal states)"></a><div class="keyword"><b><a class="anchor" name="date"></a><a href="#7.3.2-date">date</a></b>(<span style="color: #008">[<span style="color: #080">&lt;offset&gt;</span><span style="color: #008">[,<span style="color: #080">&lt;unit&gt;</span>]</span>]</span>) : integer</div><pre class="text">Returns the current date as the epoch (number of seconds since 01/01/1970).
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If an offset value is specified, then it is added to the current date before
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It must only be used for debugging purpose. The exact format is not
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documented because it may evolve depending on developers requirements.
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</pre><a class="anchor" name="tgroup"></a><a class="anchor" name="7-tgroup"></a><a class="anchor" name="7.3.2-tgroup"></a><a class="anchor" name="tgroup (Using ACLs and fetching samples)"></a><a class="anchor" name="tgroup (Fetching samples from internal states)"></a><div class="keyword"><b><a class="anchor" name="tgroup"></a><a href="#7.3.2-tgroup">tgroup</a></b> : integer</div><pre class="text">Returns an integer value corresponding to the position of the thread group
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calling the function, between 0 and (global.thread-groups - 1). This is
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useful for logging and debugging purposes.
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</pre><a class="anchor" name="thread"></a><a class="anchor" name="7-thread"></a><a class="anchor" name="7.3.2-thread"></a><a class="anchor" name="thread (Using ACLs and fetching samples)"></a><a class="anchor" name="thread (Fetching samples from internal states)"></a><div class="keyword"><b><a class="anchor" name="thread"></a><a href="#7.3.2-thread">thread</a></b> : integer</div><pre class="text">Returns an integer value corresponding to the position of the thread calling
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the function, between 0 and (global.nbthread-1). This is useful for logging
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and debugging purposes.
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HAProxy 3.4-dev8-128 &ndash; Configuration Manual<br>
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HAProxy 3.4-dev8-149 &ndash; Configuration Manual<br>
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<small>, 2026/04/03</small>
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‎docs/dev/intro.html‎

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<title>HAProxy version 3.4-dev8-128 - Starter Guide</title>
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<title>HAProxy version 3.4-dev8-149 - Starter Guide</title>
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<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
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<link href="https://raw.githubusercontent.com/thomaspark/bootswatch/v3.3.7/cerulean/bootstrap.min.css" rel="stylesheet" />
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You can use <strong>left</strong> and <strong>right</strong> arrow keys to navigate between chapters.<br>
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</p>
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<small>Converted with <a href="https://github.com/cbonte/haproxy-dconv">haproxy-dconv</a> v<b>0.4.2-15</b> on <b>2026/04/13</b></small>
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<small>Converted with <a href="https://github.com/cbonte/haproxy-dconv">haproxy-dconv</a> v<b>0.4.2-15</b> on <b>2026/04/14</b></small>
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<h1><a href="http://www.haproxy.org/" title="HAProxy"><img src="../img/HAProxyCommunityEdition_60px.png?0.4.2-15" /></a></h1>
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<h2>Starter Guide</h2>
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HAProxy 3.4-dev8-128 &ndash; Starter Guide<br>
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HAProxy 3.4-dev8-149 &ndash; Starter Guide<br>
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<small>, </small>
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‎docs/dev/management.html‎

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<link href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
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<link href="https://raw.githubusercontent.com/thomaspark/bootswatch/v3.3.7/cerulean/bootstrap.min.css" rel="stylesheet" />
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You can use <strong>left</strong> and <strong>right</strong> arrow keys to navigate between chapters.<br>
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<small>Converted with <a href="https://github.com/cbonte/haproxy-dconv">haproxy-dconv</a> v<b>0.4.2-15</b> on <b>2026/04/13</b></small>
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<small>Converted with <a href="https://github.com/cbonte/haproxy-dconv">haproxy-dconv</a> v<b>0.4.2-15</b> on <b>2026/04/14</b></small>
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<h1><a href="http://www.haproxy.org/" title="HAProxy"><img src="../img/HAProxyCommunityEdition_60px.png?0.4.2-15" /></a></h1>
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<h2>Management Guide</h2>
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<p><strong>version 3.4-dev8-128</strong></p>
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HAProxy 3.4-dev8-128 &ndash; Management Guide<br>
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HAProxy 3.4-dev8-149 &ndash; Management Guide<br>
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<small>, </small>
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