diff options
| author | Joshua Slive <slive@apache.org> | 2002-05-23 16:23:51 +0200 |
|---|---|---|
| committer | Joshua Slive <slive@apache.org> | 2002-05-23 16:23:51 +0200 |
| commit | 700dc34d7c5ebc8c847d38671c70ded3f9a56a1e (patch) | |
| tree | e61383e7c4f09556afa12321b88ccaa006f7202e /docs/manual/mod/perchild.html.en | |
| parent | Build file updated to work with modified ant to get us the proper extension (diff) | |
| download | apache2-700dc34d7c5ebc8c847d38671c70ded3f9a56a1e.tar.xz apache2-700dc34d7c5ebc8c847d38671c70ded3f9a56a1e.zip | |
No change here except the filename extensions. Sorry for the massic commit.
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95240 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'docs/manual/mod/perchild.html.en')
| -rw-r--r-- | docs/manual/mod/perchild.html.en | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/docs/manual/mod/perchild.html.en b/docs/manual/mod/perchild.html.en new file mode 100644 index 0000000000..cc85838e0d --- /dev/null +++ b/docs/manual/mod/perchild.html.en @@ -0,0 +1,73 @@ +<html xmlns="http://www.w3.org/TR/xhtml1/strict"><head><!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --><title>perchild- 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 perchild</h1><table cellspacing="1" cellpadding="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td valign="top"><span class="help">Description:</span></td><td>Multi-Processing Module allowing for daemon processes + serving requests to be assigned a variety of different + userids</td></tr><tr><td><a href="module-dict.html#Status" class="help">Status:</a></td><td>MPM</td></tr><tr><td><a href="module-dict.html#ModuleIdentifier" class="help">Module Identifier:</a></td><td>mpm_perchild_module</td></tr></table></td></tr></table><h2>Summary</h2> +<blockquote><table><tr><td bgcolor="#ffe5f5"> +This MPM does not currently work on most platforms. Work is ongoing to +make it functional. +</td></tr></table></blockquote> + + <p>This Multi-Processing Module (MPM) implements a hybrid + multi-process, multi-threaded web server. A fixed number of + processes create threads to handle requests. Fluctuations in + load are handled by increasing or decreasing the number of + threads in each process.</p> + + <p>A single control process launches the number of child processes + indicated by the <a href="mpm_common.html#numservers" class="directive"><code class="directive">NumServers</code></a> directive at server + startup. Each child process creates threads as specified in the + <code>StartThreads</code> directive. The individual threads then + listen for connections and serve them when they arrive.</p> + + <p>Apache always tries to maintain a pool of <em>spare</em> or + idle server threads, which stand ready to serve incoming + requests. In this way, clients do not need to wait for new + threads to be created. For each child process, Apache assesses + the number of idle threads and creates or destroys threads to + keep this number within the boundaries specified by + <code>MinSpareThreads</code> and <code>MaxSpareThreads</code>. + Since this process is very self-regulating, it is rarely + necessary to modify these directives from their default values. + The maximum number of clients that may be served simultaneously + is determined by multiplying the number of server processes + that will be created (<code>NumServers</code>) by the maximum + number of threads created in each process + (<code>MaxThreadsPerChild</code>).</p> + + <p>While the parent process is usually started as root under + Unix in order to bind to port 80, the child processes and + threads are launched by Apache as a less-privileged user. The + <code>User</code> and <code>Group</code> directives are used to + set the privileges of the Apache child processes. The child + processes must be able to read all the content that will be + served, but should have as few privileges beyond that as + possible. In addition, unless <a href="../suexec.html">suexec</a> is used, these directives also + set the privileges which will be inherited by CGI scripts.</p> + + <p><code>MaxRequestsPerChild</code> controls how frequently the + server recycles processes by killing old ones and launching new + ones.</p> + + <p>See also: <a href="../bind.html">Setting which addresses and + ports Apache uses</a>.</p> + + <p>In addition it adds the extra ability to specify that + specific processes should serve requests under different + userids. These processes can then be associated with specific + virtual hosts.</p> + +<h2>Directives</h2><ul><li><a href="#assignuserid">AssignUserId</a></li><li><a href="#childperuserid">ChildPerUserId</a></li><li><a href="mpm_common.html#coredumpdirectory">CoreDumpDirectory</a></li><li><a href="mpm_common.html#group">Group</a></li><li><a href="mpm_common.html#listen">Listen</a></li><li><a href="mpm_common.html#listenbacklog">ListenBacklog</a></li><li><a href="mpm_common.html#lockfile">LockFile</a></li><li><a href="mpm_common.html#maxrequestsperchild">MaxRequestsPerChild</a></li><li><a href="mpm_common.html#maxsparethreads">MaxSpareThreads</a></li><li><a href="mpm_common.html#maxthreadsperchild">MaxThreadsPerChild</a></li><li><a href="mpm_common.html#minsparethreads">MinSpareThreads</a></li><li><a href="mpm_common.html#numservers">NumServers</a></li><li><a href="mpm_common.html#pidfile">PidFile</a></li><li><a href="mpm_common.html#scoreboardfile">ScoreBoardFile</a></li><li><a href="mpm_common.html#sendbuffersize">SendBufferSize</a></li><li><a href="mpm_common.html#startthreads">StartThreads</a></li><li><a href="mpm_common.html#user">User</a></li></ul><hr/><h2><a name="AssignUserId">AssignUserId</a> <a name="assignuserid">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td><strong>Description: </strong></td><td/></tr><tr><td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>AssignUserID <em>user_id</em> <em>group_id</em></td></tr><tr><td><a href="directive-dict.html#Context" class="help">Context:</a></td><td>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>perchild</td></tr></table></td></tr></table> + <p>Tie a virtual host to a specific child process. Requests addressed to +the virtual host where this directive appears will be served by the process +running with the specified user and group id.</p> +<hr/><h2><a name="ChildPerUserId">ChildPerUserId</a> <a name="childperuserid">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td><strong>Description: </strong></td><td/></tr><tr><td><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>ChildPerUserID <em>user_id</em> +<em>group_id</em> <em>child_id</em></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>perchild</td></tr></table></td></tr></table> + <p>Specify a user id and group id for a specific child process. The number of +children if set by the <a href="mpm_common.html#numservers">NumServers</a> +directive. For example, the default value for <a href="mpm_common.html#numservers">NumServers</a> is 5 and that means +children ids 1,2,3,4 and 5 are available for assigment. If a child does not +have an associated ChildPerUserID, it inherits the <a href="mpm_common.html#user">User</a> and <a href="mpm_common.html#group">Group</a> settings from the main server </p> +<hr/></blockquote><h3 align="center">Apache HTTP Server Version 2.0</h3><a href="./"><img src="../images/index.gif" alt="Index"/></a><a href="../"><img src="../images/home.gif" alt="Home"/></a></body></html>
\ No newline at end of file |