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<title>mod_watchdog - Apache HTTP Server Version 2.4</title>
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<p class="apache">Apache HTTP Server Version 2.4</p>
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<a href="https://www.apache.org/">Apache</a> > <a href="https://httpd.apache.org/">HTTP Server</a> > <a href="https://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div>
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<div id="preamble"><h1>Apache Module mod_watchdog</h1>
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<p><span>Available Languages: </span><a href="../en/mod/mod_watchdog.html" title="English"> en </a> |
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>provides infrastructure for other modules to periodically run
tasks</td></tr>
<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>watchdog_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_watchdog.c</td></tr>
<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3 and later</td></tr></table>
<h3>Summary</h3>
<p><code class="module"><a href="../mod/mod_watchdog.html">mod_watchdog</a></code> defines programmatic hooks for other modules to
periodically run tasks. These modules can register handlers for
<code class="module"><a href="../mod/mod_watchdog.html">mod_watchdog</a></code> hooks. Currently, the following modules in the
Apache distribution use this functionality:</p>
<ul>
<li><code class="module"><a href="../mod/mod_heartbeat.html">mod_heartbeat</a></code></li>
<li><code class="module"><a href="../mod/mod_heartmonitor.html">mod_heartmonitor</a></code></li>
<li><code class="module"><a href="../mod/mod_md.html">mod_md</a></code></li>
<li><code class="module"><a href="../mod/mod_proxy_hcheck.html">mod_proxy_hcheck</a></code></li>
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To allow a module to use <code class="module"><a href="../mod/mod_watchdog.html">mod_watchdog</a></code> functionality,
<code class="module"><a href="../mod/mod_watchdog.html">mod_watchdog</a></code> itself must be statically linked to the server
core or, if a dynamic module, be loaded before the calling module.
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<div id="quickview"><h3 class="directives">Directives</h3>
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<li><img alt="" src="../images/down.gif"> <a href="#watchdoginterval">WatchdogInterval</a></li>
</ul>
<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_watchdog">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_watchdog">Report a bug</a></li></ul></div>
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<div class="directive-section"><h2 id="watchdoginterval"><span id="WatchdogInterval">WatchdogInterval</span> Directive <a title="Permanent link" href="#watchdoginterval" class="permalink">¶</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Watchdog interval in seconds</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>WatchdogInterval <var>time-interval</var>[s]</code></td></tr>
<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>WatchdogInterval 1</code></td></tr>
<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Base</td></tr>
<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_watchdog</td></tr>
</table>
<p>Sets the interval at which the watchdog_step hook runs. Default is to run every
second.</p>
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