diff options
Diffstat (limited to 'docs/manual/mod/event.html.en')
| -rw-r--r-- | docs/manual/mod/event.html.en | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/docs/manual/mod/event.html.en b/docs/manual/mod/event.html.en new file mode 100644 index 00000000..2e55d4b6 --- /dev/null +++ b/docs/manual/mod/event.html.en @@ -0,0 +1,146 @@ +<?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>event - Apache HTTP Server</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 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 2.2</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/">Documentation</a> > <a href="../">Version 2.2</a> > <a href="./">Modules</a></div> +<div id="page-content"> +<div id="preamble"><h1>Apache MPM event</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/event.html" title="English"> en </a></p> +</div> +<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>An experimental variant of the standard <code class="module"><a href="../mod/worker.html">worker</a></code> +MPM</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_event_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>event.c</td></tr></table> +<h3>Summary</h3> + + <div class="warning"><h3>Warning</h3> + <p>This MPM is experimental, so it may or may not work as + expected.</p> + </div> + + <p>The <code class="module"><a href="../mod/event.html">event</a></code> Multi-Processing Module (MPM) is + designed to allow more requests to be served simultaneously by + passing off some processing work to supporting threads, freeing up + the main threads to work on new requests. It is based on the + <code class="module"><a href="../mod/worker.html">worker</a></code> MPM, which implements a hybrid + multi-process multi-threaded server. Run-time configuration + directives are identical to those provided by + <code class="module"><a href="../mod/worker.html">worker</a></code>.</p> + + <p>To use the <code class="module"><a href="../mod/event.html">event</a></code> MPM, add + <code>--with-mpm=event</code> to the <code class="program"><a href="../programs/configure.html">configure</a></code> + script's arguments when building the <code class="program"><a href="../programs/httpd.html">httpd</a></code>.</p> + +</div> +<div id="quickview"><h3 class="directives">Directives</h3> +<ul id="toc"> +<li><img alt="" src="../images/right.gif" /> <a href="mpm_common.html#acceptmutex">AcceptMutex</a></li> +<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="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#maxmemfree">MaxMemFree</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#threadstacksize">ThreadStackSize</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" /> <a href="#how-it-works">How it Works</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#requirements">Requirements</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#issues">Issues</a></li> +</ul><h3>See also</h3> +<ul class="seealso"> +<li><a href="worker.html">The worker MPM</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></h2> + <p>This MPM tries to fix the 'keep alive problem' in HTTP. After a client + completes the first request, the client can keep the connection + open, and send further requests using the same socket. This can + save signifigant overhead in creating TCP connections. However, + Apache traditionally keeps an entire child process/thread waiting + for data from the client, which brings its own disadvantages. To + solve this problem, this MPM uses a dedicated thread to handle both + the Listening sockets, and all sockets that are in a Keep Alive + state.</p> + + <p>The MPM assumes that the underlying <code>apr_pollset</code> + implementation is reasonably threadsafe. This enables the MPM to + avoid excessive high level locking, or having to wake up the listener + thread in order to send it a keep-alive socket. This is currently + only compatible with KQueue and EPoll.</p> + +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="requirements" id="requirements">Requirements</a></h2> + <p>This MPM depends on <a class="glossarylink" href="../glossary.html#apr" title="see glossary">APR</a>'s atomic + compare-and-swap operations for thread synchronization. If you are + compiling for an x86 target and you don't need to support 386s, or + you are compiling for a SPARC and you don't need to run on + pre-UltraSPARC chips, add + <code>--enable-nonportable-atomics=yes</code> to the + <code class="program"><a href="../programs/configure.html">configure</a></code> script's arguments. This will cause + APR to implement atomic operations using efficient opcodes not + available in older CPUs.</p> + + <p>This MPM does not perform well on older platforms which lack good + threading, but the requirement for EPoll or KQueue makes this + moot.</p> + + <ul> + + <li>To use this MPM on FreeBSD, FreeBSD 5.3 or higher is recommended. + However, it is possible to run this MPM on FreeBSD 5.2.1, if you + use <code>libkse</code> (see <code>man libmap.conf</code>).</li> + + <li>For NetBSD, at least version 2.0 is recommended.</li> + + <li>For Linux, a 2.6 kernel is recommended. It is also necessary to + ensure that your version of <code>glibc</code> has been compiled + with support for EPoll.</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="issues" id="issues">Issues</a></h2> + <p>At present, this MPM is incompatible with <code class="module"><a href="../mod/mod_ssl.html">mod_ssl</a></code>, and + other input filters.</p> +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/event.html" title="English"> en </a></p> +</div><div id="footer"> +<p class="apache">Copyright 2006 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/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div> +</body></html>
\ No newline at end of file |