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--><title>mpm_common- Apache HTTP Server</title><link href="../style/manual.css" type="text/css" rel="stylesheet"/></head><body><blockquote><div align="center"><img src="../images/sub.gif" alt="[APACHE DOCUMENTATION]"/><h3>Apache HTTP Server Version 2.0</h3></div><h1 align="center">Apache Module mpm_common</h1><table cellspacing="1" cellpadding="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td valign="top"><span class="help">Description:</span></td><td>A collection of directives that are implemented by
-more than one multi-processing module (MPM)</td></tr><tr><td><a href="module-dict.html#Status" class="help">Status:</a></td><td>MPM</td></tr></table></td></tr></table><h2>Directives</h2><ul><li><a href="#coredumpdirectory">CoreDumpDirectory</a></li><li><a href="#group">Group</a></li><li><a href="#listen">Listen</a></li><li><a href="#listenbacklog">ListenBackLog</a></li><li><a href="#lockfile">LockFile</a></li><li><a href="#maxclients">MaxClients</a></li><li><a href="#maxrequestsperchild">MaxRequestsPerChild</a></li><li><a href="#maxsparethreads">MaxSpareThreads</a></li><li><a href="#maxthreadsperchild">MaxThreadsPerChild</a></li><li><a href="#minsparethreads">MinSpareThreads</a></li><li><a href="#numservers">NumServers</a></li><li><a href="#pidfile">PidFile</a></li><li><a href="#scoreboardfile">ScoreBoardFile</a></li><li><a href="#sendbuffersize">SendBufferSize</a></li><li><a href="#serverlimit">ServerLimit</a></li><li><a href="#startservers">StartServers</a></li><li><a href="#startthreads">StartThreads</a></li><li><a href="#threadlimit">ThreadLimit</a></li><li><a href="#threadsperchild">ThreadsPerChild</a></li><li><a href="#user">User</a></li></ul><hr/><h2><a name="CoreDumpDirectory">CoreDumpDirectory</a> <a name="coredumpdirectory">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Sets the directory where Apache attempts to
+more than one multi-processing module (MPM)</td></tr><tr><td><a href="module-dict.html#Status" class="help">Status:</a></td><td>MPM</td></tr></table></td></tr></table><h2>Directives</h2><ul><li><a href="#coredumpdirectory">CoreDumpDirectory</a></li><li><a href="#group">Group</a></li><li><a href="#listen">Listen</a></li><li><a href="#listenbacklog">ListenBackLog</a></li><li><a href="#lockfile">LockFile</a></li><li><a href="#maxclients">MaxClients</a></li><li><a href="#maxrequestsperchild">MaxRequestsPerChild</a></li><li><a href="#maxsparethreads">MaxSpareThreads</a></li><li><a href="#maxthreadsperchild">MaxThreadsPerChild</a></li><li><a href="#minsparethreads">MinSpareThreads</a></li><li><a href="#numservers">NumServers</a></li><li><a href="#pidfile">PidFile</a></li><li><a href="#scoreboardfile">ScoreBoardFile</a></li><li><a href="#sendbuffersize">SendBufferSize</a></li><li><a href="#serverlimit">ServerLimit</a></li><li><a href="#startservers">StartServers</a></li><li><a href="#startthreads">StartThreads</a></li><li><a href="#threadlimit">ThreadLimit</a></li><li><a href="#threadsperchild">ThreadsPerChild</a></li><li><a href="#user">User</a></li></ul><hr/><h2><a name="CoreDumpDirectory">CoreDumpDirectory</a> <a name="coredumpdirectory">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Directory where Apache attempts to
switch before dumping core</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>CoreDumpDirectory <em>directory</em></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>See usage for the default setting</code></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td></tr><tr><td nowrap="nowrap"><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>
<p>This controls the directory to which Apache attempts to
as, core dumps won't normally get written. If you want a core
dump for debugging, you can use this directive to place it in a
different location.</p>
-<hr/><h2><a name="Group">Group</a> <a name="group">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Sets the group under which the server will answer
+<hr/><h2><a name="Group">Group</a> <a name="group">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Group under which the server will answer
requests</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>Group <em>unix-group</em></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>Group #-1</code></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config, virtual host</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td></tr><tr><td nowrap="nowrap"><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>
<p>The <code class="directive">Group</code> directive sets the group under
which the server will answer requests. In order to use this
<a href="mod_suexec.html#suexecusergroup" class="directive"><code class="directive">SuexecUserGroup</code></a>
directive. SECURITY: See <a href="#user" class="directive"><code class="directive">User</code></a> for a discussion of the
security considerations.</p>
-<hr/><h2><a name="Listen">Listen</a> <a name="listen">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Sets the IP addresses and ports that the server
+<hr/><h2><a name="Listen">Listen</a> <a name="listen">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>IP addresses and ports that the server
listens to</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>Listen [<em>IP-address</em>:]<em>portnumber</em></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td></tr><tr><td nowrap="nowrap"><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>
<p>The <code class="directive">Listen</code> directive instructs Apache to
listen to only specific IP addresses or ports; by default it
a lockfile with the same name as the one the server will try to
create.</p>
<hr/><h2><a name="MaxClients">MaxClients</a> <a name="maxclients">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Maximum number of child processes that will be created
-to serve requests</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>MaxClients <em>number</em></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>>MaxClients
+to serve requests</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>MaxClients <em>number</em></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>MaxClients
8 (with threads) MaxClients 256</code></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td></tr><tr><td nowrap="nowrap"><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>
<p>The <code class="directive">MaxClients</code> directive sets the limit
on the number of child processes that will be created to serve
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>
-<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 bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Sets the file where the server records the process ID
+<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 bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>File where the server records the process ID
of the daemon</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>PidFile <em>filename</em></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>PidFile logs/httpd.pid</code></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>MPM</td></tr><tr><td nowrap="nowrap"><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>
<p>The <code class="directive">PidFile</code> directive sets the file to
which the server records the process id of the daemon. If the
<directivesynopsis>
<name>CoreDumpDirectory</name>
-<description>Sets the directory where Apache attempts to
+<description>Directory where Apache attempts to
switch before dumping core</description>
<syntax>CoreDumpDirectory <em>directory</em></syntax>
<default>See usage for the default setting</default>
<directivesynopsis>
<name>Group</name>
-<description>Sets the group under which the server will answer
+<description>Group under which the server will answer
requests</description>
<syntax>Group <em>unix-group</em></syntax>
<default>Group #-1</default>
<directivesynopsis>
<name>PidFile</name>
-<description>Sets the file where the server records the process ID
+<description>File where the server records the process ID
of the daemon</description>
<syntax>PidFile <em>filename</em></syntax>
<default>PidFile logs/httpd.pid</default>
<directivesynopsis>
<name>Listen</name>
-<description>Sets the IP addresses and ports that the server
+<description>IP addresses and ports that the server
listens to</description>
<syntax>Listen [<em>IP-address</em>:]<em>portnumber</em></syntax>
<contextlist><context>server config</context></contextlist>
<description>Maximum number of child processes that will be created
to serve requests</description>
<syntax>MaxClients <em>number</em></syntax>
-<default>>MaxClients
+<default>MaxClients
8 (with threads) MaxClients 256</default>
<contextlist><context>server config</context></contextlist>
<modulelist><module>worker</module><module>prefork</module>