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1276 lines
41 KiB
HTML
1276 lines
41 KiB
HTML
<html>
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<head>
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<META http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<!--
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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This file is generated from xml source: DO NOT EDIT
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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-->
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<title>mpm_common - Apache HTTP Server</title>
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<link href="../style/manual.css" type="text/css" rel="stylesheet">
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</head>
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<body>
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<blockquote>
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<div align="center">
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<img alt="[APACHE DOCUMENTATION]" src="../images/sub.gif"><h3>Apache HTTP Server Version 2.0</h3>
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</div>
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<h1 align="center">Apache Module mpm_common</h1>
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<table cellspacing="1" cellpadding="0" bgcolor="#cccccc">
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<tr>
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<td>
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<table bgcolor="#ffffff">
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<tr>
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<td><span class="help">Description:</span></td><td>
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<description>A collection of directives that are implemented by
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more than one multi-processing module (MPM)</description>
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</td>
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</tr>
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<tr>
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<td><a href="module-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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<h2>Directives</h2>
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<ul>
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<li>
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<a href="#coredumpdirectory">CoreDumpDirectory</a>
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</li>
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<li>
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<a href="#group">Group</a>
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</li>
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<li>
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<a href="#listen">Listen</a>
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</li>
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<li>
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<a href="#listenbacklog">ListenBackLog</a>
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</li>
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<li>
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<a href="#lockfile">LockFile</a>
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</li>
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<li>
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<a href="#maxclients">MaxClients</a>
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</li>
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<li>
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<a href="#maxrequestperchild">MaxRequestPerChild</a>
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</li>
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<li>
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<a href="#maxsparethreads">MaxSpareThreads</a>
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</li>
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<li>
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<a href="#maxthreadsperchild">MaxThreadsPerChild</a>
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</li>
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<li>
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<a href="#minsparethreads">MinSpareThreads</a>
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</li>
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<li>
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<a href="#numservers">NumServers</a>
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</li>
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<li>
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<a href="#pidfile">PidFile</a>
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</li>
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<li>
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<a href="#scoreboardfile">ScoreBoardFile</a>
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</li>
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<li>
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<a href="#sendbuffersize">SendBufferSize</a>
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</li>
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<li>
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<a href="#serverlimit">ServerLimit</a>
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</li>
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<li>
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<a href="#startservers">StartServers</a>
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</li>
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<li>
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<a href="#startthreads">StartThreads</a>
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</li>
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<li>
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<a href="#threadlimit">ThreadLimit</a>
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</li>
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<li>
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<a href="#threadsperchild">ThreadsPerChild</a>
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</li>
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<li>
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<a href="#user">User</a>
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</li>
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</ul>
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<hr>
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<h2>
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<a name="CoreDumpDirectory">CoreDumpDirectory</a> <a name="coredumpdirectory">Directive</a>
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</h2>
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<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
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<tr>
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<td>
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<table width="100%" bgcolor="#ffffff">
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<tr>
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<td><strong>Description: </strong></td><td>Sets the directory where Apache attempts to
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switch before dumping core</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
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<syntax>CoreDumpDirectory <em>directory</em>
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</syntax>
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</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>CoreDumpDirectory ServerRoot</code></td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code>, <code><a href="prefork.html">prefork</a></code>, <code><a href="mpm_winnt.html">mpm_winnt</a></code></td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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<usage>
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<p>This controls the directory to which Apache attempts to
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switch before dumping core. The default is in the
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<code class="directive"><a href="core.html#serverroot" class="directive">ServerRoot</a></code> directory, however
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since this should not be writable by the user the server runs
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as, core dumps won't normally get written. If you want a core
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dump for debugging, you can use this directive to place it in a
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different location.</p>
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</usage>
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<hr>
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<h2>
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<a name="Group">Group</a> <a name="group">Directive</a>
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</h2>
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<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
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<tr>
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<td>
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<table width="100%" bgcolor="#ffffff">
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<tr>
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<td><strong>Description: </strong></td><td>Sets the group under which the server will answer
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requests</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
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<syntax>Group <em>unix-group</em>
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</syntax>
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</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>Group #-1</code></td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config, virtual host</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code>, <code><a href="prefork.html">prefork</a></code></td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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<usage>
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<p>The <code class="directive">Group</code> directive sets the group under
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which the server will answer requests. In order to use this
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directive, the stand-alone server must be run initially as root.
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<em>Unix-group</em> is one of:</p>
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<dl>
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<dt>A group name</dt>
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<dd>Refers to the given group by name.</dd>
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<dt># followed by a group number.</dt>
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<dd>Refers to a group by its number.</dd>
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</dl>
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<p>It is recommended that you set up a new group specifically for
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running the server. Some admins use user <code>nobody</code>,
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but this is not always possible or desirable.</p>
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<p>Note: if you start the server as a non-root user, it will
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fail to change to the specified group, and will instead
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continue to run as the group of the original user.</p>
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<p>Special note: Use of this directive in <VirtualHost< is
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no longer supported. To implement the <a href="../suexec.html">suEXEC wrapper</a> with Apache 2.0, use the
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<code class="directive"><a href="mod_suexec.html#suexecusergroup" class="directive">SuexecUserGroup</a></code>
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directive. SECURITY: See <code class="directive"><a href="#user" class="directive">User</a></code> for a discussion of the
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security considerations.</p>
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</usage>
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<hr>
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<h2>
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<a name="Listen">Listen</a> <a name="listen">Directive</a>
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</h2>
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<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
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<tr>
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<td>
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<table width="100%" bgcolor="#ffffff">
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<tr>
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<td><strong>Description: </strong></td><td>Sets the IP addresses and ports that the server
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listens to</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
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<syntax>Listen [<em>IP-address</em>:]<em>portnumber</em>
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</syntax>
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</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code>, <code><a href="prefork.html">prefork</a></code>, <code><a href="mpm_winnt.html">mpm_winnt</a></code></td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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<usage>
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<p>The <code class="directive">Listen</code> directive instructs Apache to
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listen to only specific IP addresses or ports; by default it
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responds to requests on all IP interfaces. The Listen directive is
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now a required directive. If it is not in the config file, the
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server will fail to start. This is a change from previous versions
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of Apache.</p>
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<p>The Listen directive tells the server to accept incoming
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requests on the specified port or address-and-port combination.
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If only a port number is specified, the server listens to the
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given port on all interfaces. If an IP address is given as well
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as a port, the server will listen on the given port and
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interface.</p>
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<p>Multiple Listen directives may be used to specify a number
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of addresses and ports to listen to. The server will respond to
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requests from any of the listed addresses and ports.</p>
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<p>For example, to make the server accept connections on both
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port 80 and port 8000, use:</p>
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<blockquote>
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<table cellpadding="10">
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<tr>
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<td bgcolor="#eeeeee"><code>
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Listen 80<br>
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Listen 8000
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</code></td>
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</tr>
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</table>
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</blockquote>
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To make the server accept connections on two specified
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interfaces and port numbers, use
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<blockquote>
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<table cellpadding="10">
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<tr>
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<td bgcolor="#eeeeee"><code>
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Listen 192.170.2.1:80<br>
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Listen 192.170.2.5:8000
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</code></td>
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</tr>
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</table>
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</blockquote>
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IPv6 addresses must be surrounded in square brackets, as in the
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following example:
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<blockquote>
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<table cellpadding="10">
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<tr>
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<td bgcolor="#eeeeee"><code>
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Listen [fe80::a00:20ff:fea7:ccea]:80
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</code></td>
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</tr>
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</table>
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</blockquote>
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</usage>
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<p>
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<strong>See also:</strong>
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</p>
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<ul>
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<li>
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<a href="../dns-caveats.html">DNS Issues</a>
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</li>
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<li>
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<a href="../bind.html">Setting
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which addresses and ports Apache uses</a>
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</li>
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</ul>
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<hr>
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<h2>
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<a name="ListenBackLog">ListenBackLog</a> <a name="listenbacklog">Directive</a>
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</h2>
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<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
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<tr>
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<td>
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<table width="100%" bgcolor="#ffffff">
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<tr>
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<td><strong>Description: </strong></td><td>Maximum length of the queue of pending connections</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
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<syntax>ListenBacklog <em>backlog</em>
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</syntax>
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</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>ListenBacklog 511</code></td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code>, <code><a href="prefork.html">prefork</a></code>, <code><a href="mpm_winnt.html">mpm_winnt</a></code></td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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<usage>
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<p>The maximum length of the queue of pending connections.
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Generally no tuning is needed or desired, however on some
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systems it is desirable to increase this when under a TCP SYN
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flood attack. See the backlog parameter to the
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<code>listen(2)</code> system call.</p>
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<p>This will often be limited to a smaller number by the
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operating system. This varies from OS to OS. Also note that
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many OSes do not use exactly what is specified as the backlog,
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but use a number based on (but normally larger than) what is
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set.</p>
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</usage>
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<hr>
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<h2>
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<a name="LockFile">LockFile</a> <a name="lockfile">Directive</a>
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</h2>
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<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
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<tr>
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<td>
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<table width="100%" bgcolor="#ffffff">
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<tr>
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<td><strong>Description: </strong></td><td>Location of the accept serialization lock file</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
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<syntax>LockFile <em>filename</em>
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</syntax>
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</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>LockFile logs/accept.lock</code></td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code>, <code><a href="prefork.html">prefork</a></code></td>
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</tr>
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</table>
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</td>
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</tr>
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</table>
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<usage>
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<p>The <code class="directive">LockFile</code> directive sets the path to
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the lockfile used when Apache is compiled with either
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USE_FCNTL_SERIALIZED_ACCEPT or USE_FLOCK_SERIALIZED_ACCEPT. This
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directive should normally be left at its default value. The main
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reason for changing it is if the <code>logs</code> directory is
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NFS mounted, since <strong>the lockfile must be stored on a local
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disk</strong>. The PID of the main server process is
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automatically appended to the filename.</p>
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<p>
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<strong>SECURITY:</strong> It is best to avoid putting this
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file in a world writable directory such as
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<code>/var/tmp</code> because someone could create a denial of
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service attack and prevent the server from starting by creating
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a lockfile with the same name as the one the server will try to
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create.</p>
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</usage>
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<hr>
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<h2>
|
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<a name="MaxClients">MaxClients</a> <a name="maxclients">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
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<tr>
|
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<td>
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<table width="100%" bgcolor="#ffffff">
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<tr>
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<td><strong>Description: </strong></td><td>Maximum number of child processes that will be created
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to serve requests</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
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<syntax>MaxClients <em>number</em>
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</syntax>
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</td>
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</tr>
|
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<tr>
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<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>>MaxClients
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8 (with threads) MaxClients 256</code></td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
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</tr>
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<tr>
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<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="prefork.html">prefork</a></code></td>
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</tr>
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</table>
|
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</td>
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</tr>
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</table>
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<usage>
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<p>The <code class="directive">MaxClients</code> directive sets the limit
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on the number of child processes that will be created to serve
|
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requests. When the server is built without threading, no more than
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this number of clients can be served simultaneously. To configure
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more than 256 clients with the prefork MPM, you must use the
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<code class="directive"><a href="#serverlimit" class="directive">ServerLimit</a></code> directive.
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To configure more than 1024 clients with the worker MPM, you must
|
|
use the <code class="directive"><a href="#serverlimit" class="directive">ServerLimit</a></code> and
|
|
<code class="directive"><a href="#threadlimit" class="directive">ThreadLimit</a></code> directives.</p>
|
|
|
|
|
|
<p>Any connection attempts over the
|
|
<code class="directive">MaxClients</code> limit will normally be queued,
|
|
up to a number based on the <code class="directive"><a href="#listenbacklog" class="directive">ListenBacklog</a></code> directive. Once a child
|
|
process is freed at the end of a different request, the connection
|
|
will then be serviced.</p>
|
|
|
|
|
|
<p>When the server is compiled with threading, then the maximum
|
|
number of simultaneous requests that can be served is obtained
|
|
from the value of this directive multiplied by
|
|
<code class="directive"><a href="#threadsperchild" class="directive">ThreadsPerChild</a></code>.</p>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h2>
|
|
<a name="MaxRequestPerChild">MaxRequestPerChild</a> <a name="maxrequestperchild">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Limit on the number of requests that an individual child server
|
|
will handle during its life</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>MaxRequestsPerChild <em>number</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>MaxRequestsPerChild 10000</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code>, <code><a href="prefork.html">prefork</a></code>, <code><a href="mpm_winnt.html">mpm_winnt</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>The <code class="directive">MaxRequestsPerChild</code> directive sets
|
|
the limit on the number of requests that an individual child
|
|
server process will handle. After
|
|
<code class="directive">MaxRequestsPerChild</code> requests, the child
|
|
process will die. If <code class="directive">MaxRequestsPerChild</code> is
|
|
0, then the process will never expire.</p>
|
|
|
|
|
|
<p>Setting <code class="directive">MaxRequestsPerChild</code> to a
|
|
non-zero limit has two beneficial effects:</p>
|
|
|
|
|
|
<ul>
|
|
|
|
<li>it limits the amount of memory that process can consume
|
|
by (accidental) memory leakage;</li>
|
|
|
|
|
|
<li>by giving processes a finite lifetime, it helps reduce
|
|
the number of processes when the server load reduces.</li>
|
|
|
|
</ul>
|
|
|
|
|
|
<p>
|
|
<strong>NOTE:</strong> For <em>KeepAlive</em> requests, only
|
|
the first request is counted towards this limit. In effect, it
|
|
changes the behavior to limit the number of
|
|
<em>connections</em> per child.</p>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h2>
|
|
<a name="MaxSpareThreads">MaxSpareThreads</a> <a name="maxsparethreads">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Maximum number of idle threads</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>MaxSpareThreads <em>number</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>MaxSpareThreads 10 (Perchild) or 500 (worker)</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>Maximum number of idle threads. Different MPMs deal with this
|
|
directive differently. <code><a href="perchild.html">perchild</a></code> monitors the
|
|
number of idle threads on a per-child basis. If there are too many
|
|
idle threads in that child, the server will begin to kill threads
|
|
within that child.</p>
|
|
|
|
|
|
<p>
|
|
<code><a href="worker.html">worker</a></code> deals with idle threads on a
|
|
server-wide basis. If there are too many idle threads in the
|
|
server then child processes are killed until the number of idle
|
|
threads is less than this number.</p>
|
|
|
|
|
|
</usage>
|
|
<p>
|
|
<strong>See also:</strong>
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<code class="directive"><a href="#minsparethreads" class="directive">MinSpareThreads</a></code>
|
|
</li>
|
|
<li>
|
|
<code class="directive"><a href="#startservers" class="directive">StartServers</a></code>
|
|
</li>
|
|
</ul>
|
|
<hr>
|
|
<h2>
|
|
<a name="MaxThreadsPerChild">MaxThreadsPerChild</a> <a name="maxthreadsperchild">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Maximum number of threads per child process</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>MaxThreadsPerChild <em>number</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>MaxThreadsPerChild 64</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>Maximum number of threads per child. For MPMs with a
|
|
variable number of threads per child, this directive sets the
|
|
maximum number of threads that will be created in each child
|
|
process. To increase this value beyond its default, it is
|
|
necessary to change the value of the compile-time define
|
|
<code>HARD_THREAD_LIMIT</code> and recompile the server.</p>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h2>
|
|
<a name="MinSpareThreads">MinSpareThreads</a> <a name="minsparethreads">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Minimum number of idle threads available to handle request
|
|
spikes</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>MinSpareServers <em>number</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>MinSpareThreads 5 (Perchild) or 250 (worker)</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>Minimum number of idle threads to handle request spikes.
|
|
Different MPMs deal with this directive
|
|
differently. <code><a href="perchild.html">perchild</a></code> monitors the number of idle
|
|
threads on a per-child basis. If there aren't enough idle threads
|
|
in that child, the server will begin to create new threads within
|
|
that child.</p>
|
|
|
|
|
|
<p>
|
|
<code><a href="worker.html">worker</a></code> deals with idle threads on a
|
|
server-wide basis. If there aren't enough idle threads in the
|
|
server then child processes are created until the number of idle
|
|
threads is greater than number.</p>
|
|
|
|
</usage>
|
|
<p>
|
|
<strong>See also:</strong>
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<code class="directive"><a href="#maxsparethreads" class="directive">MaxSpareThreads</a></code>
|
|
</li>
|
|
<li>
|
|
<code class="directive"><a href="#startservers" class="directive">StartServers</a></code>
|
|
</li>
|
|
</ul>
|
|
<hr>
|
|
<h2>
|
|
<a name="NumServers">NumServers</a> <a name="numservers">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Total number of children alive at the same time</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>NumServers <em>number</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>NumServers 2</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="perchild.html">perchild</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>Number of children alive at the same time. MPMs that use
|
|
this directive do not dynamically create new child processes so
|
|
this number should be large enough to handle the requests for
|
|
the entire site.</p>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h2>
|
|
<a name="PidFile">PidFile</a> <a name="pidfile">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Sets the file where the server records the process ID
|
|
of the daemon</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>PidFile <em>filename</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>PidFile logs/httpd.pid</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchilde.html">perchilde</a></code>, <code><a href="prefork.html">prefork</a></code>, <code><a href="mpm_winnt.html">mpm_winnt</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>The <code class="directive">PidFile</code> directive sets the file to
|
|
which the server records the process id of the daemon. If the
|
|
filename does not begin with a slash (/) then it is assumed to be
|
|
relative to the <code class="directive"><a href="core.html#serverroot" class="directive">ServerRoot</a></code>.</p>
|
|
|
|
|
|
<p>It is often useful to be able to send the server a signal,
|
|
so that it closes and then reopens its <code class="directive"><a href="core.html#errorlog" class="directive">ErrorLog</a></code> and TransferLog, and
|
|
re-reads its configuration files. This is done by sending a
|
|
SIGHUP (kill -1) signal to the process id listed in the
|
|
PidFile.</p>
|
|
|
|
|
|
<p>The PidFile is subject to the same warnings about log file
|
|
placement and <a href="../misc/security_tips.html#serverroot">security</a>.</p>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h2>
|
|
<a name="ScoreBoardFile">ScoreBoardFile</a> <a name="scoreboardfile">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Location of the file used to store coordination data for
|
|
the child processes</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>ScoreBoardFile <em>file-path</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>ScoreBoardFile logs/apache_status</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code>, <code><a href="prefork.html">prefork</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>The <code class="directive">ScoreBoardFile</code> directive is required
|
|
on some architectures to place a file that the server will use to
|
|
communicate between its children and the parent. The easiest way
|
|
to find out if your architecture requires a scoreboard file is to
|
|
run Apache and see if it creates the file named by the
|
|
directive. If your architecture requires it then you must ensure
|
|
that this file is not used at the same time by more than one
|
|
invocation of Apache.</p>
|
|
|
|
|
|
<p>If you have to use a <code class="directive">ScoreBoardFile</code> then
|
|
you may see improved speed by placing it on a RAM disk. But be
|
|
careful that you heed the same warnings about log file placement
|
|
and <a href="../misc/security_tips.html">security</a>.</p>
|
|
|
|
</usage>
|
|
<p>
|
|
<strong>See also:</strong>
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<a href="../stopping.html">Stopping and Restarting Apache</a>
|
|
</li>
|
|
</ul>
|
|
<hr>
|
|
<h2>
|
|
<a name="SendBufferSize">SendBufferSize</a> <a name="sendbuffersize">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>TCP buffer size</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>SendBufferSize <em>bytes</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code>, <code><a href="prefork.html">prefork</a></code>, <code><a href="mpm_winnt.html">mpm_winnt</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>The server will set the TCP buffer size to the number of bytes
|
|
specified. Very useful to increase past standard OS defaults on
|
|
high speed high latency (<em>i.e.</em>, 100ms or so, such as
|
|
transcontinental fast pipes).</p>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h2>
|
|
<a name="ServerLimit">ServerLimit</a> <a name="serverlimit">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Upper limit on configurable number of processes</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>ServerLimit <em>number</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>ServerLimit 256 (prefork), ServerLimit 16 (worker)</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="prefork.html">prefork</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>For the <code><a href="prefork.html">prefork</a></code> MPM, this directive sets the
|
|
maximum configured value for <code class="directive"><a href="#maxclients" class="directive">MaxClients</a></code> for the lifetime of the
|
|
Apache process. For the worker MPM, this directive in combination
|
|
with <code class="directive"><a href="#threadlimit" class="directive">ThreadLimit</a></code> sets
|
|
the maximum configured value for <code class="directive"><a href="#maxclients" class="directive">MaxClients</a></code> for the lifetime of the
|
|
Apache process. Any attempts to change this directive during a
|
|
restart will be ignored, but <code class="directive"><a href="#maxclients" class="directive">MaxClients</a></code> can be modified during
|
|
a restart.</p>
|
|
|
|
|
|
<p>Special care must be taken when using this directive. If
|
|
<code class="directive">ServerLimit</code> is set to a value much higher
|
|
than necessary, extra, unused shared memory will be allocated. If
|
|
both <code class="directive">ServerLimit</code> and <code class="directive"><a href="#maxclients" class="directive">MaxClients</a></code> are set to values
|
|
higher than the system can handle, Apache may not start or the
|
|
system may become unstable.</p>
|
|
|
|
|
|
<p>With the <code><a href="prefork.html">prefork</a></code> MPM, use this directive only
|
|
if you need to set <code class="directive"><a href="#maxclients" class="directive">MaxClients</a></code> higher higher than 256.
|
|
Do not set the value of this directive any higher than what you
|
|
might want to set <code class="directive"><a href="#maxclients" class="directive">MaxClients</a></code> to.</p>
|
|
|
|
|
|
<p>With the <code><a href="worker.html">worker</a></code> MPM, use this directive only
|
|
if your <code class="directive"><a href="#maxclients" class="directive">MaxClients</a></code> and
|
|
<code class="directive"><a href="#threadsperchild" class="directive">ThreadsPerChild</a></code>
|
|
settings require more than 16 server processes. Do not set the
|
|
value of this directive any higher than the number of server
|
|
processes required by what you may want for <code class="directive"><a href="#maxclients " class="directive">MaxClients </a></code> and <code class="directive"><a href="#threadsperchild" class="directive">ThreadsPerChild</a></code>.</p>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h2>
|
|
<a name="StartServers">StartServers</a> <a name="startservers">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Number of child server processes created at startup</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>StartServers <em>number</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>StartServers 5</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>The <code class="directive">StartServers</code> directive sets the
|
|
number of child server processes created on startup. As the number
|
|
of processes is dynamically controlled depending on the load,
|
|
there is usually little reason to adjust this parameter.</p>
|
|
|
|
</usage>
|
|
<p>
|
|
<strong>See also:</strong>
|
|
</p>
|
|
<ul>
|
|
<li>
|
|
<code class="directive"><a href="#minsparethreads" class="directive">MinSpareThreads</a></code>
|
|
</li>
|
|
<li>
|
|
<code class="directive"><a href="#maxsparethreads" class="directive">MaxSpareThreads</a></code>
|
|
</li>
|
|
</ul>
|
|
<hr>
|
|
<h2>
|
|
<a name="StartThreads">StartThreads</a> <a name="startthreads">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Nubmer of threads each child creates on startup</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>StartThreads <em>number</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>StartThreads 5</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="perchild.html">perchild</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>Number of threads each child creates on startup. As the
|
|
number of threads is dynamically controlled depending on the
|
|
load, there is usually little reason to adjust this
|
|
parameter.</p>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h2>
|
|
<a name="ThreadLimit">ThreadLimit</a> <a name="threadlimit">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Sets the upper limit on the configurable number of threads
|
|
per child process</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>ThreadLimit <em>number</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>ThreadLimit 64</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>This directive sets the maximum configured value for <code class="directive"><a href="#threadsperchild" class="directive">ThreadsPerChild</a></code> for the lifetime
|
|
of the Apache process. Any attempts to change this directive
|
|
during a restart will be ignored, but <code class="directive"><a href="#threadsperchild" class="directive">ThreadsPerChild</a></code> can be modified
|
|
during a restart up to the value of this directive.</p>
|
|
|
|
|
|
<p>Special care must be taken when using this directive. If
|
|
<code class="directive">ThreadLimit</code> is set to a value much higher
|
|
than <code class="directive"><a href="#threadsperchild" class="directive">ThreadsPerChild</a></code>,
|
|
extra unused shared memory will be allocated. If both
|
|
<code class="directive">ThreadLimit</code> and <code class="directive"><a href="#threadsperchild" class="directive">ThreadsPerChild</a></code> are set to values
|
|
higher than the system can handle, Apache may not start or the
|
|
system may become unstable.</p>
|
|
|
|
|
|
<p>Use this directive only if you need to set <code class="directive"><a href="#threadsperchild" class="directive">ThreadsPerChild</a></code> higher than 64. Do
|
|
not set the value of this directive any higher than what you might
|
|
want to set <code class="directive"><a href="#threadsperchild" class="directive">ThreadsPerChild</a></code> to.</p>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h2>
|
|
<a name="ThreadsPerChild">ThreadsPerChild</a> <a name="threadsperchild">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>Number of threads created by each child process</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>ThreadsPerChild <em>number</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>ThreadsPerChild 50</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="mpm_winnt.html">mpm_winnt</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>This directive sets the number of threads created by each
|
|
child process. The child creates these threads at startup and
|
|
never creates more. if using an MPM like mpmt_winnt, where
|
|
there is only one child process, this number should be high
|
|
enough to handle the entire load of the server. If using an MPM
|
|
like worker, where there are multiple child processes, the
|
|
total number of threads should be high enough to handle the
|
|
common load on the server.</p>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h2>
|
|
<a name="User">User</a> <a name="user">Directive</a>
|
|
</h2>
|
|
<table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc">
|
|
<tr>
|
|
<td>
|
|
<table width="100%" bgcolor="#ffffff">
|
|
<tr>
|
|
<td><strong>Description: </strong></td><td>The userid under which the server will answer
|
|
requests</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>
|
|
<syntax>User <em>unix-userid</em>
|
|
</syntax>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>User #-1</code></td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config, virtual host</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td>
|
|
</tr>
|
|
<tr>
|
|
<td><a href="directive-dict.html#Module" class="help">Module:</a></td><td><code><a href="worker.html">worker</a></code>, <code><a href="perchild.html">perchild</a></code>, <code><a href="prefork.html">prefork</a></code></td>
|
|
</tr>
|
|
</table>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
<usage>
|
|
|
|
<p>The <code class="directive">User</code> directive sets the userid as
|
|
which the server will answer requests. In order to use this
|
|
directive, the standalone server must be run initially as
|
|
root. <em>Unix-userid</em> is one of:</p>
|
|
|
|
|
|
<dl>
|
|
|
|
<dt>A username</dt>
|
|
|
|
|
|
<dd>Refers to the given user by name.</dd>
|
|
|
|
|
|
<dt># followed by a user number.</dt>
|
|
|
|
|
|
<dd>Refers to a user by their number.</dd>
|
|
|
|
</dl>
|
|
|
|
|
|
<p>The user should have no privileges which result in it being
|
|
able to access files which are not intended to be visible to the
|
|
outside world, and similarly, the user should not be able to
|
|
execute code which is not meant for httpd requests. It is
|
|
recommended that you set up a new user and group specifically for
|
|
running the server. Some admins use user <code>nobody</code>, but
|
|
this is not always possible or desirable. For example
|
|
<code><a href="mod_proxy.html">mod_proxy</a></code>'s cache, when enabled, must be
|
|
accessible to this user (see <code class="directive"><a href="mod_proxy.html#cacheroot" class="directive">CacheRoot</a></code>).</p>
|
|
|
|
|
|
<p>Notes: If you start the server as a non-root user, it will
|
|
fail to change to the lesser privileged user, and will instead
|
|
continue to run as that original user. If you do start the
|
|
server as root, then it is normal for the parent process to
|
|
remain running as root.</p>
|
|
|
|
|
|
<p>Special note: Use of this directive in <code class="directive"><a href="core.html#virtualhost" class="directive"><VirtualHost></a></code> is no longer supported. To
|
|
configure your server for <a href="mod_suexec.html">suexec</a> use
|
|
<code class="directive"><a href="mod_suexec.html#suexecusergroup" class="directive">SuexecUserGroup</a></code>.</p>
|
|
|
|
|
|
<blockquote>
|
|
<table>
|
|
<tr>
|
|
<td bgcolor="#e0e5f5">
|
|
<p align="center">
|
|
<strong>Security</strong>
|
|
</p>
|
|
<p>Don't set <code class="directive">User</code>
|
|
(or <code class="directive"><a href="#group" class="directive">Group</a></code>) to
|
|
<code>root</code> unless you know exactly what you are doing, and what
|
|
the dangers are.</p>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
</blockquote>
|
|
|
|
</usage>
|
|
<hr>
|
|
<h3 align="center">Apache HTTP Server Version 2.0</h3>
|
|
<a href="./"><img alt="Index" src="../images/index.gif"></a><a href="../"><img alt="Home" src="../images/home.gif"></a>
|
|
</blockquote>
|
|
</body>
|
|
</html>
|