github.com/krum110487/go-htaccess@v0.0.0-20240316004156-60641c8e7598/tests/data/apache_2_2_34/manual/mpm.html.en (about) 1 <?xml version="1.0" encoding="ISO-8859-1"?> 2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> 3 <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> 4 <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type" /> 5 <!-- 6 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 7 This file is generated from xml source: DO NOT EDIT 8 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 9 --> 10 <title>Multi-Processing Modules (MPMs) - Apache HTTP Server Version 2.2</title> 11 <link href="./style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> 12 <link href="./style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> 13 <link href="./style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link rel="stylesheet" type="text/css" href="./style/css/prettify.css" /> 14 <script src="./style/scripts/prettify.min.js" type="text/javascript"> 15 </script> 16 17 <link href="./images/favicon.ico" rel="shortcut icon" /><link href="http://httpd.apache.org/docs/current/mpm.html" rel="canonical" /></head> 18 <body id="manual-page"><div id="page-header"> 19 <p class="menu"><a href="./mod/">Modules</a> | <a href="./mod/directives.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="./glossary.html">Glossary</a> | <a href="./sitemap.html">Sitemap</a></p> 20 <p class="apache">Apache HTTP Server Version 2.2</p> 21 <img alt="" src="./images/feather.gif" /></div> 22 <div class="up"><a href="./"><img title="<-" alt="<-" src="./images/left.gif" /></a></div> 23 <div id="path"> 24 <a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="./">Version 2.2</a></div><div id="page-content"><div class="retired"><h4>Please note</h4> 25 <p> This document refers to a legacy release (<strong>2.2</strong>) of Apache httpd. The active release (<strong>2.4</strong>) is documented <a href="http://httpd.apache.org/docs/current">here</a>. If you have not already upgraded, please follow <a href="http://httpd.apache.org/docs/current/upgrading.html">this link</a> for more information.</p> 26 <p>You may follow <a href="http://httpd.apache.org/docs/current/mpm.html">this link</a> to go to the current version of this document.</p></div><div id="preamble"><h1>Multi-Processing Modules (MPMs)</h1> 27 <div class="toplang"> 28 <p><span>Available Languages: </span><a href="./de/mpm.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> | 29 <a href="./en/mpm.html" title="English"> en </a> | 30 <a href="./es/mpm.html" hreflang="es" rel="alternate" title="Español"> es </a> | 31 <a href="./fr/mpm.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | 32 <a href="./ja/mpm.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | 33 <a href="./ko/mpm.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | 34 <a href="./tr/mpm.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a> | 35 <a href="./zh-cn/mpm.html" hreflang="zh-cn" rel="alternate" title="Simplified Chinese"> zh-cn </a></p> 36 </div> 37 38 <p>This document describes what a Multi-Processing Module is and 39 how they are used by the Apache HTTP Server.</p> 40 </div> 41 <div id="quickview"><ul id="toc"><li><img alt="" src="./images/down.gif" /> <a href="#introduction">Introduction</a></li> 42 <li><img alt="" src="./images/down.gif" /> <a href="#choosing">Choosing an MPM</a></li> 43 <li><img alt="" src="./images/down.gif" /> <a href="#defaults">MPM Defaults</a></li> 44 </ul><ul class="seealso"><li><a href="#comments_section">Comments</a></li></ul></div> 45 <div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> 46 <div class="section"> 47 <h2><a name="introduction" id="introduction">Introduction</a></h2> 48 49 <p>The Apache HTTP Server is designed to be a powerful and 50 flexible web server that can work on a very wide variety of 51 platforms in a range of different environments. Different 52 platforms and different environments often require different 53 features, or may have different ways of implementing the same 54 feature most efficiently. Apache has always accommodated a wide 55 variety of environments through its modular design. This design 56 allows the webmaster to choose which features will be included 57 in the server by selecting which modules to load either at 58 compile-time or at run-time.</p> 59 60 <p>Apache 2.0 extends this modular design to the most basic 61 functions of a web server. The server ships with a selection of 62 Multi-Processing Modules (MPMs) which are responsible for 63 binding to network ports on the machine, accepting requests, 64 and dispatching children to handle the requests.</p> 65 66 <p>Extending the modular design to this level of the server 67 allows two important benefits:</p> 68 69 <ul> 70 <li>Apache can more cleanly and efficiently support a wide 71 variety of operating systems. In particular, the Windows 72 version of Apache is now much more efficient, since 73 <code class="module"><a href="./mod/mpm_winnt.html">mpm_winnt</a></code> can use native 74 networking features in place of the POSIX layer used in 75 Apache 1.3. This benefit also extends to other operating 76 systems that implement specialized MPMs.</li> 77 78 <li>The server can be better customized for the needs of the 79 particular site. For example, sites that need a great deal of 80 scalability can choose to use a threaded MPM like 81 <code class="module"><a href="./mod/worker.html">worker</a></code> or <code class="module"><a href="./mod/event.html">event</a></code>, while sites requiring 82 stability or compatibility with older software can use a 83 <code class="module"><a href="./mod/prefork.html">prefork</a></code>.</li> 84 </ul> 85 86 <p>At the user level, MPMs appear much like other Apache 87 modules. The main difference is that one and only one MPM must 88 be loaded into the server at any time. The list of available 89 MPMs appears on the <a href="mod/">module index page</a>.</p> 90 91 </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> 92 <div class="section"> 93 <h2><a name="choosing" id="choosing">Choosing an MPM</a></h2> 94 95 <p>MPMs must be chosen during configuration, and compiled into 96 the server. Compilers are capable of optimizing a lot of 97 functions if threads are used, but only if they know that 98 threads are being used.</p> 99 100 <p>To actually choose the desired MPM, use the argument 101 <code>--with-mpm=<em>NAME</em></code> with the 102 <code class="program"><a href="./programs/configure.html">configure</a></code> script. <em>NAME</em> is the name of the 103 desired MPM.</p> 104 105 <p>Once the server has been compiled, it is possible to 106 determine which MPM was chosen by using <code>./httpd 107 -l</code>. This command will list every module that is compiled 108 into the server, including the MPM.</p> 109 </div><div class="top"><a href="#page-header"><img alt="top" src="./images/up.gif" /></a></div> 110 <div class="section"> 111 <h2><a name="defaults" id="defaults">MPM Defaults</a></h2> 112 113 <p>The following table lists the default MPMs for various operating 114 systems. This will be the MPM selected if you do not make another 115 choice at compile-time.</p> 116 117 <table> 118 119 <tr><td>BeOS</td><td><code class="module"><a href="./mod/beos.html">beos</a></code></td></tr> 120 <tr><td>Netware</td><td><code class="module"><a href="./mod/mpm_netware.html">mpm_netware</a></code></td></tr> 121 <tr><td>OS/2</td><td><code class="module"><a href="./mod/mpmt_os2.html">mpmt_os2</a></code></td></tr> 122 <tr><td>Unix</td><td><code class="module"><a href="./mod/prefork.html">prefork</a></code></td></tr> 123 <tr><td>Windows</td><td><code class="module"><a href="./mod/mpm_winnt.html">mpm_winnt</a></code></td></tr> 124 </table> 125 </div></div> 126 <div class="bottomlang"> 127 <p><span>Available Languages: </span><a href="./de/mpm.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> | 128 <a href="./en/mpm.html" title="English"> en </a> | 129 <a href="./es/mpm.html" hreflang="es" rel="alternate" title="Español"> es </a> | 130 <a href="./fr/mpm.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | 131 <a href="./ja/mpm.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | 132 <a href="./ko/mpm.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | 133 <a href="./tr/mpm.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a> | 134 <a href="./zh-cn/mpm.html" hreflang="zh-cn" rel="alternate" title="Simplified Chinese"> zh-cn </a></p> 135 </div><div class="top"><a href="#page-header"><img src="./images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. 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