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diff --git a/docs/manual/mod/worker.html.en b/docs/manual/mod/worker.html.en index c3203a28c4..c323ff4936 100644 --- a/docs/manual/mod/worker.html.en +++ b/docs/manual/mod/worker.html.en @@ -1,12 +1,14 @@ -<html><head><META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><!-- +<?xml version="1.0" encoding="ISO-8859-1"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!-- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX This file is generated from xml source: DO NOT EDIT XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - --><title>worker - 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 worker</h1><table cellspacing="1" cellpadding="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap" valign="top"><span class="help">Description: - </span></td><td>Multi-Processing Module implementing a hybrid - multi-threaded multi-process web server</td></tr><tr><td nowrap="nowrap"><a href="module-dict.html#Status" class="help">Status: - </a></td><td>MPM</td></tr><tr><td nowrap="nowrap"><a href="module-dict.html#ModuleIdentifier" class="help">Module Identifier: - </a></td><td>mpm_worker_module</td></tr></table></td></tr></table><h2>Summary</h2> + --><title>worker - Apache HTTP Server</title><link href="../style/css/manual-sbar-right-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="right sidebar - blue (font 100%)" /><link href="../style/css/manual-sbar-right-90pc.css" rel="alternate stylesheet" media="all" type="text/css" title="right sidebar - blue (font 90%)" /><link href="../style/css/manual-sbar-right-fix15.css" rel="stylesheet" media="all" type="text/css" title="right sidebar - blue (font fix 15)" /><link href="../style/css/manual-sbar-right-fix13.css" rel="alternate stylesheet" media="all" type="text/css" title="right sidebar - 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blue (font fix 15)" /><link href="../style/css/manual-sbar-left-fix13.css" rel="alternate stylesheet" media="all" type="text/css" title="left sidebar - blue (font fix 13)" /><link href="../style/css/manual-sbar-left-100pc-b.css" rel="alternate stylesheet" media="all" type="text/css" title="left sidebar - black (font 100%)" /><link href="../style/css/manual-sbar-left-90pc-b.css" rel="alternate stylesheet" media="all" type="text/css" title="left sidebar - black (font 90%)" /><link href="../style/css/manual-sbar-left-fix15-b.css" rel="alternate stylesheet" media="all" type="text/css" title="left sidebar - black (font fix 15)" /><link href="../style/css/manual-sbar-left-fix13-b.css" rel="alternate stylesheet" media="all" type="text/css" title="left sidebar - black (font fix 13)" /><link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="loose style - blue (font 100%)" /><link href="../style/css/manual-loose-90pc.css" rel="alternate stylesheet" media="all" type="text/css" title="loose style - blue (font 90%)" /><link href="../style/css/manual-loose-fix15.css" rel="alternate stylesheet" media="all" type="text/css" title="loose style - blue (font fix 15)" /><link href="../style/css/manual-loose-fix13.css" rel="alternate stylesheet" media="all" type="text/css" title="loose style - blue (font fix 13)" /><link href="../style/css/manual-loose-100pc-b.css" rel="alternate stylesheet" media="all" type="text/css" title="loose style - black (font 100%)" /><link href="../style/css/manual-loose-90pc-b.css" rel="alternate stylesheet" media="all" type="text/css" title="loose style - black (font 90%)" /><link href="../style/css/manual-loose-fix15-b.css" rel="alternate stylesheet" media="all" type="text/css" title="loose style - black (font fix 15)" /><link href="../style/css/manual-loose-fix13-b.css" rel="alternate stylesheet" media="all" type="text/css" title="loose style - black (font fix 13)" /><link href="../images/favicon.ico" rel="shortcut icon" /></head><body><div id="page-header"><p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p><p class="apache">Apache HTTP Server Version 2.0</p><img alt="" src="../images/feather.gif" /></div><div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div><div id="path"><a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs-project/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">Modules</a></div><div id="page-content"><div id="preamble"><h1>Apache Module worker</h1><table class="module"><tr><th>Description: + </th><td>Multi-Processing Module implementing a hybrid + multi-threaded multi-process web server</td></tr><tr><th><a href="module-dict.html#Status">Status: + </a></th><td>MPM</td></tr><tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier: + </a></th><td>mpm_worker_module</td></tr></table><h3>Summary</h3> <p>This Multi-Processing Module (MPM) implements a hybrid multi-process multi-threaded server. By using threads to serve requests, it is able to serve a large number of requests with @@ -15,21 +17,21 @@ keeping multiple processes available, each with many threads.</p> <p>The most important directives used to control this MPM are - <a href="../mod/mpm_common.html#threadsperchild" class="directive"><code class="directive">ThreadsPerChild</code></a>, which + <code class="directive"><a href="../mod/mpm_common.html#threadsperchild">ThreadsPerChild</a></code>, which controls the number of threads deployed by each child process and - <a href="../mod/mpm_common.html#maxclients" class="directive"><code class="directive">MaxClients</code></a>, which + <code class="directive"><a href="../mod/mpm_common.html#maxclients">MaxClients</a></code>, which controls the maximum total number of threads that may be launched.</p> -<h2>Directives</h2><ul><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#maxclients">MaxClients</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#minsparethreads">MinSpareThreads</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#serverlimit">ServerLimit</a></li><li><a href="mpm_common.html#startservers">StartServers</a></li><li><a href="mpm_common.html#threadlimit">ThreadLimit</a></li><li><a href="mpm_common.html#threadsperchild">ThreadsPerChild</a></li><li><a href="mpm_common.html#user">User</a></li></ul><p><strong>See also </strong></p><ul><li><a href="../bind.html">Setting which addresses and - ports Apache uses</a></li></ul><h2>How it Works</h2> +</div><div id="quickview"><h3 class="directives">Directives</h3><ul id="toc"><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#coredumpdirectory">CoreDumpDirectory</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#group">Group</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#listen">Listen</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#listenbacklog">ListenBacklog</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#lockfile">LockFile</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#maxclients">MaxClients</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#maxrequestsperchild">MaxRequestsPerChild</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#maxsparethreads">MaxSpareThreads</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#minsparethreads">MinSpareThreads</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#pidfile">PidFile</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#scoreboardfile">ScoreBoardFile</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#sendbuffersize">SendBufferSize</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#serverlimit">ServerLimit</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#startservers">StartServers</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#threadlimit">ThreadLimit</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#threadsperchild">ThreadsPerChild</a></li><li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#user">User</a></li></ul><h3>Topics</h3><ul id="topics"><li><img alt="" src="../images/down.gif" /> How it Works</li></ul><h3>See also</h3><ul class="seealso"><li><a href="../bind.html">Setting which addresses and + ports Apache uses</a></li></ul></div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="section"><h2>How it Works</h2> <p>Each process has a fixed number of threads. The server adjusts to handle load by increasing or decreasing the number of processes.</p> <p>A single control process is responsible for launching child processes. Each child process creates a fixed number of threads as - specified in the <a href="../mod/mpm_common.html#threadsperchild" class="directive"><code class="directive">ThreadsPerChild</code></a> directive. The + specified in the <code class="directive"><a href="../mod/mpm_common.html#threadsperchild">ThreadsPerChild</a></code> directive. The individual threads then listen for connections and serve them when they arrive.</p> @@ -38,34 +40,34 @@ requests. In this way, clients do not need to wait for a new threads or processes to be created before their requests can be served. The number of processes that will initially launched is - set by the <a href="../mod/mpm_common.html#startservers" class="directive"><code class="directive">StartServers</code></a> + set by the <code class="directive"><a href="../mod/mpm_common.html#startservers">StartServers</a></code> directive. Then during operation, Apache assesses the total number of idle threads in all processes, and forks or kills processes to - keep this number within the boundaries specified by <a href="../mod/mpm_common.html#minsparethreads" class="directive"><code class="directive">MinSpareThreads</code></a> and <a href="../mod/mpm_common.html#maxsparethreads" class="directive"><code class="directive">MaxSpareThreads</code></a>. Since this + keep this number within the boundaries specified by <code class="directive"><a href="../mod/mpm_common.html#minsparethreads">MinSpareThreads</a></code> and <code class="directive"><a href="../mod/mpm_common.html#maxsparethreads">MaxSpareThreads</a></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 (i.e., the maximum total number of threads in all processes) is determined by the - <a href="../mod/mpm_common.html#maxclients" class="directive"><code class="directive">MaxClients</code></a> directive, + <code class="directive"><a href="../mod/mpm_common.html#maxclients">MaxClients</a></code> directive, while the maximum number of processes that can be launched is set - by the <a href="../mod/mpm_common.html#serverlimit" class="directive"><code class="directive">ServerLimit</code></a> - directive. <a href="../mod/mpm_common.html#serverlimit" class="directive"><code class="directive">ServerLimit</code></a> - multiplied by <a href="../mod/mpm_common.html#threadsperchild" class="directive"><code class="directive">ThreadsPerChild</code></a> must be greater - than or equal to <a href="../mod/mpm_common.html#maxclients" class="directive"><code class="directive">MaxClients</code></a></p> + by the <code class="directive"><a href="../mod/mpm_common.html#serverlimit">ServerLimit</a></code> + directive. <code class="directive"><a href="../mod/mpm_common.html#serverlimit">ServerLimit</a></code> + multiplied by <code class="directive"><a href="../mod/mpm_common.html#threadsperchild">ThreadsPerChild</a></code> must be greater + than or equal to <code class="directive"><a href="../mod/mpm_common.html#maxclients">MaxClients</a></code></p> <p>A typical configuration of the process-thread controls in - the <code><a href="../mod/worker.html">worker</a></code> MPM could look as follows:</p> + the <code class="module"><a href="../mod/worker.html">worker</a></code> MPM could look as follows:</p> -<blockquote><table cellpadding="10"><tr><td bgcolor="#eeeeee"><code><pre>StartServers 2 +<div class="example"><pre>StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 -ServerLimit 16</pre></code></td></tr></table></blockquote> +ServerLimit 16</pre></div> <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 <a href="../mod/mpm_common.html#user" class="directive"><code class="directive">User</code></a> and <a href="../mod/mpm_common.html#group" class="directive"><code class="directive">Group</code></a> directives are used to set + launched by Apache as a less-privileged user. The <code class="directive"><a href="../mod/mpm_common.html#user">User</a></code> and <code class="directive"><a href="../mod/mpm_common.html#group">Group</a></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 @@ -73,7 +75,7 @@ ServerLimit 16</pre></code></td></tr></table></blockquote> these directives also set the privileges which will be inherited by CGI scripts.</p> - <p><a href="../mod/mpm_common.html#maxrequestsperchild" class="directive"><code class="directive">MaxRequestsPerChild</code></a> + <p><code class="directive"><a href="../mod/mpm_common.html#maxrequestsperchild">MaxRequestsPerChild</a></code> controls how frequently the server recycles processes by killing old ones and launching new ones.</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>
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