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apache/docs/manual/mod/mod_status.xml
2010-11-04 17:12:35 +00:00

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<?xml version="1.0"?>
<!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
<?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
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<modulesynopsis metafile="mod_status.xml.meta">
<name>mod_status</name>
<description>Provides information on server activity and
performance</description>
<status>Base</status>
<sourcefile>mod_status.c</sourcefile>
<identifier>status_module</identifier>
<summary>
<p>The Status module allows a server administrator to find out
how well their server is performing. A HTML page is presented
that gives the current server statistics in an easily readable
form. If required this page can be made to automatically
refresh (given a compatible browser). Another page gives a
simple machine-readable list of the current server state.</p>
<p>The details given are:</p>
<ul>
<li>The number of worker serving requests</li>
<li>The number of idle worker</li>
<li>The status of each worker, the number of requests that
worker has performed and the total number of bytes served by
the worker (*)</li>
<li>A total number of accesses and byte count served (*)</li>
<li>The time the server was started/restarted and the time it
has been running for</li>
<li>Averages giving the number of requests per second, the
number of bytes served per second and the average number of
bytes per request (*)</li>
<li>The current percentage CPU used by each worker and in
total by all workers combined (*)</li>
<li>The current hosts and requests being processed (*)</li>
</ul>
<p>The lines marked "(*)" are only available if
<directive module="core">ExtendedStatus</directive>
is <code>On</code>. In version 2.3.6, loading mod_status will
toggle <directive module="core">ExtendedStatus</directive> On
by default.</p>
</summary>
<section id="enable">
<title>Enabling Status Support</title>
<p>To enable status reports only for browsers from the example.com
domain add this code to your <code>httpd.conf</code>
configuration file</p>
<example>
&lt;Location /server-status&gt;<br />
SetHandler server-status<br />
<br />
Require host example.com<br />
&lt;/Location&gt;
</example>
<p>You can now access server statistics by using a Web browser
to access the page
<code>http://your.server.name/server-status</code></p>
</section>
<section id="autoupdate">
<title>Automatic Updates</title>
<p>You can get the status page to update itself automatically if
you have a browser that supports "refresh". Access the page
<code>http://your.server.name/server-status?refresh=N</code> to
refresh the page every N seconds.</p>
</section>
<section id="machinereadable">
<title>Machine Readable Status File</title>
<p>A machine-readable version of the status file is available by
accessing the page
<code>http://your.server.name/server-status?auto</code>. This
is useful when automatically run, see the Perl program
<code>log_server_status</code>, which you will find in the
<code>/support</code> directory of your Apache HTTP Server installation.</p>
<note>
<strong>It should be noted that if <module>mod_status</module> is
compiled into the server, its handler capability is available
in <em>all</em> configuration files, including
<em>per</em>-directory files (<em>e.g.</em>,
<code>.htaccess</code>). This may have security-related
ramifications for your site.</strong>
</note>
</section>
</modulesynopsis>