diff options
| author | Joe Orton <jorton@apache.org> | 2020-08-19 09:31:23 +0200 |
|---|---|---|
| committer | Joe Orton <jorton@apache.org> | 2020-08-19 09:31:23 +0200 |
| commit | 7f6aec2cf7fb0caaa93dc98e25968d58b60107fd (patch) | |
| tree | 2218e4fdf202d9781910e0218b690acbdc92a0d5 /docs/manual/mod/prefork.html.en | |
| parent | Follow up to r1880368 by adjusting en.xml to match lang-targets.xml. (diff) | |
| download | apache2-7f6aec2cf7fb0caaa93dc98e25968d58b60107fd.tar.xz apache2-7f6aec2cf7fb0caaa93dc98e25968d58b60107fd.zip | |
Follow up to r1880368 and r1880980:
Complete move to .en.utf8 suffixes in two steps:
1. From fresh checkout, renamed all existing files:
$ for f in *.html.en */*.html.en; do svn mv $f $f.utf8; done
2. Ran "./build.sh all" which also regenerates the typemaps.
[skip ci]
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1880982 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'docs/manual/mod/prefork.html.en')
| -rw-r--r-- | docs/manual/mod/prefork.html.en | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/docs/manual/mod/prefork.html.en b/docs/manual/mod/prefork.html.en deleted file mode 100644 index 0be9a5cad1..0000000000 --- a/docs/manual/mod/prefork.html.en +++ /dev/null @@ -1,218 +0,0 @@ -<?xml version="1.0" encoding="UTF-8"?> -<!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> -<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> -<!-- - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - This file is generated from xml source: DO NOT EDIT - XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - --> -<title>prefork - Apache HTTP Server Version 2.5</title> -<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /> -<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /> -<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" /> -<script src="../style/scripts/prettify.min.js" type="text/javascript"> -</script> - -<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/quickreference.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> -<p class="apache">Apache HTTP Server Version 2.5</p> -<img alt="" src="../images/feather.png" /></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/">Documentation</a> > <a href="../">Version 2.5</a> > <a href="./">Modules</a></div> -<div id="page-content"> -<div id="preamble"><h1>Apache MPM prefork</h1> -<div class="toplang"> -<p><span>Available Languages: </span><a href="../de/mod/prefork.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> | -<a href="../en/mod/prefork.html" title="English"> en </a> | -<a href="../fr/mod/prefork.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | -<a href="../ja/mod/prefork.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | -<a href="../tr/mod/prefork.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> -</div> -<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Implements a non-threaded, pre-forking 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_prefork_module</td></tr> -<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>prefork.c</td></tr></table> -<h3>Summary</h3> - - <p>This Multi-Processing Module (MPM) implements a non-threaded, - pre-forking web server. Each server process may answer incoming - requests, and a parent process manages the size of the server pool. - It is appropriate for sites that need to avoid - threading for compatibility with non-thread-safe libraries. It - is also the best MPM for isolating each request, so that a problem - with a single request will not affect any other.</p> - - <p>This MPM is very self-regulating, so it is rarely necessary to - adjust its configuration directives. Most important is that - <code class="directive"><a href="../mod/mpm_common.html#maxrequestworkers">MaxRequestWorkers</a></code> be big enough - to handle as many simultaneous requests as you expect to receive, but - small enough to assure that there is enough physical RAM for all - processes.</p> -</div> -<div id="quickview"><h3>Topics</h3> -<ul id="topics"> -<li><img alt="" src="../images/down.gif" /> <a href="#how-it-works">How it Works</a></li> -</ul><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#enableexceptionhook">EnableExceptionHook</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mod_unixd.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#maxconnectionsperchild">MaxConnectionsPerChild</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#maxmemfree">MaxMemFree</a></li> -<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#maxrequestworkers">MaxRequestWorkers</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#maxspareservers">MaxSpareServers</a></li> -<li><img alt="" src="../images/down.gif" /> <a href="#minspareservers">MinSpareServers</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#receivebuffersize">ReceiveBufferSize</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="mod_unixd.html#user">User</a></li> -</ul> -<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mpm_prefork">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mpm_prefork">Report a bug</a></li></ul><h3>See also</h3> -<ul class="seealso"> -<li><a href="../bind.html">Setting which addresses and ports Apache HTTP Server -uses</a></li> -<li><a href="#comments_section">Comments</a></li></ul></div> -<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="section"> -<h2><a name="how-it-works" id="how-it-works">How it Works</a> <a title="Permanent link" href="#how-it-works" class="permalink">¶</a></h2> - <p>A single control process is responsible for launching child - processes which listen for connections and serve them when they - arrive. Apache httpd always tries to maintain several <dfn>spare</dfn> - or idle server processes, which stand ready to serve incoming - requests. In this way, clients do not need to wait for a new - child processes to be forked before their requests can be - served.</p> - - <p>The <code class="directive"><a href="../mod/mpm_common.html#startservers">StartServers</a></code>, - <code class="directive"><a href="#minspareservers">MinSpareServers</a></code>, - <code class="directive"><a href="#maxspareservers">MaxSpareServers</a></code>, and - <code class="directive"><a href="../mod/mpm_common.html#maxrequestworkers">MaxRequestWorkers</a></code> regulate how - the parent process creates children to serve requests. In general, - Apache httpd is very self-regulating, so most sites do not need to - adjust these directives from their default values. Sites which - need to serve more than 256 simultaneous requests may need to - increase <code class="directive"><a href="../mod/mpm_common.html#maxrequestworkers">MaxRequestWorkers</a></code>, - while sites with limited memory may need to decrease <code class="directive"><a href="../mod/mpm_common.html#maxrequestworkers">MaxRequestWorkers</a></code> to keep the server from - thrashing (swapping memory to disk and back). More information - about tuning process creation is provided in the <a href="../misc/perf-tuning.html">performance hints</a> - documentation.</p> - - <p>While the parent process is usually started as <code>root</code> - under Unix in order to bind to port 80, the child processes are - launched by Apache httpd as a less-privileged user. The <code class="directive"><a href="../mod/mod_unixd.html#user">User</a></code> and <code class="directive"><a href="../mod/mod_unixd.html#group">Group</a></code> directives are used to set - the privileges of the Apache httpd 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.</p> - - <p><code class="directive"><a href="../mod/mpm_common.html#maxconnectionsperchild">MaxConnectionsPerChild</a></code> - controls how frequently the server recycles processes by killing - old ones and launching new ones.</p> - - <p>This MPM uses the <code>mpm-accept</code> mutex to serialize - access to incoming connections when subject to the thundering herd - problem (generally, when there are multiple listening sockets). - The implementation aspects of this mutex can be configured with the - <code class="directive"><a href="../mod/core.html#mutex">Mutex</a></code> directive. The <a href="../misc/perf-tuning.html">performance hints</a> - documentation has additional information about this mutex.</p> -</div> -<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="directive-section"><h2><a name="MaxSpareServers" id="MaxSpareServers">MaxSpareServers</a> <a name="maxspareservers" id="maxspareservers">Directive</a> <a title="Permanent link" href="#maxspareservers" class="permalink">¶</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Maximum number of idle child server processes</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MaxSpareServers <var>number</var></code></td></tr> -<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MaxSpareServers 10</code></td></tr> -<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> -<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>MPM</td></tr> -<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>prefork</td></tr> -</table> - <p>The <code class="directive">MaxSpareServers</code> directive sets the - desired maximum number of <em>idle</em> child server processes. An - idle process is one which is not handling a request. If there are - more than <code class="directive">MaxSpareServers</code> idle, then the - parent process will kill off the excess processes.</p> - - <p>Tuning of this parameter should only be necessary on very - busy sites. Setting this parameter to a large number is almost - always a bad idea. If you are trying to set the value equal to or lower than - <code class="directive"><a href="#minspareservers">MinSpareServers</a></code>, Apache HTTP Server - will automatically adjust it to <code class="directive">MinSpareServers</code><code> + 1</code>.</p> - -<h3>See also</h3> -<ul> -<li><code class="directive"><a href="#minspareservers">MinSpareServers</a></code></li> -<li><code class="directive"><a href="../mod/mpm_common.html#startservers">StartServers</a></code></li> -<li><code class="directive"><a href="../mod/mpm_common.html#maxsparethreads">MaxSpareThreads</a></code></li> -</ul> -</div> -<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> -<div class="directive-section"><h2><a name="MinSpareServers" id="MinSpareServers">MinSpareServers</a> <a name="minspareservers" id="minspareservers">Directive</a> <a title="Permanent link" href="#minspareservers" class="permalink">¶</a></h2> -<table class="directive"> -<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Minimum number of idle child server processes</td></tr> -<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>MinSpareServers <var>number</var></code></td></tr> -<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>MinSpareServers 5</code></td></tr> -<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr> -<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>MPM</td></tr> -<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>prefork</td></tr> -</table> - <p>The <code class="directive">MinSpareServers</code> directive sets the - desired minimum number of <em>idle</em> child server processes. An - idle process is one which is not handling a request. If there are - fewer than <code class="directive">MinSpareServers</code> idle, then the parent - process creates new children: It will spawn one, wait a second, then spawn - two, wait a second, then spawn four, and it will - continue exponentially until it is spawning 32 children per second. It will - stop whenever it satisfies the <code class="directive">MinSpareServers</code> - setting.</p> - - <p>Tuning of this parameter should only be necessary on very - busy sites. Setting this parameter to a large number is almost - always a bad idea.</p> - -<h3>See also</h3> -<ul> -<li><code class="directive"><a href="#maxspareservers">MaxSpareServers</a></code></li> -<li><code class="directive"><a href="../mod/mpm_common.html#startservers">StartServers</a></code></li> -<li><code class="directive"><a href="../mod/mpm_common.html#minsparethreads">MinSpareThreads</a></code></li> -</ul> -</div> -</div> -<div class="bottomlang"> -<p><span>Available Languages: </span><a href="../de/mod/prefork.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> | -<a href="../en/mod/prefork.html" title="English"> en </a> | -<a href="../fr/mod/prefork.html" hreflang="fr" rel="alternate" title="Français"> fr </a> | -<a href="../ja/mod/prefork.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | -<a href="../tr/mod/prefork.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> -</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. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div> -<script type="text/javascript"><!--//--><![CDATA[//><!-- -var comments_shortname = 'httpd'; -var comments_identifier = 'http://httpd.apache.org/docs/trunk/mod/prefork.html'; -(function(w, d) { - if (w.location.hostname.toLowerCase() == "httpd.apache.org") { - d.write('<div id="comments_thread"><\/div>'); - var s = d.createElement('script'); - s.type = 'text/javascript'; - s.async = true; - s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; - (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); - } - else { - d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); - } -})(window, document); -//--><!]]></script></div><div id="footer"> -<p class="apache">Copyright 2020 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p> -<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.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></div><script type="text/javascript"><!--//--><![CDATA[//><!-- -if (typeof(prettyPrint) !== 'undefined') { - prettyPrint(); -} -//--><!]]></script> -</body></html>
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