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| author |   hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
|---|---|---|
| committer | hongbotian <hongbo.tianhongbo@huawei.com> | 2015-11-30 03:10:21 -0500 |
| commit | c0b7206652b2852bc574694e7ba07ba1c2acdc00 (patch) | |
| tree | 5cb95cb0e19e03610525903df46279df2c3b7eb1 /rubbos/app/apache2/manual/mod/worker.html.en | |
| parent | b6d3d6e668b793220f2d3af1bc3e828553dc3fe6 (diff) | |
delete app
Change-Id: Id4c572809969ebe89e946e88063eaed262cff3f2
Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/apache2/manual/mod/worker.html.en')
| -rw-r--r-- | rubbos/app/apache2/manual/mod/worker.html.en | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/rubbos/app/apache2/manual/mod/worker.html.en b/rubbos/app/apache2/manual/mod/worker.html.en deleted file mode 100644 index e38e1a03..00000000 --- a/rubbos/app/apache2/manual/mod/worker.html.en +++ /dev/null @@ -1,180 +0,0 @@ -<?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/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 2.0</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/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">Modules</a></div> -<div id="page-content"> -<div id="preamble"><h1>Apache MPM worker</h1> -<div class="toplang"> -<p><span>Available Languages: </span><a href="../de/mod/worker.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> | -<a href="../en/mod/worker.html" title="English"> en </a> | -<a href="../es/mod/worker.html" hreflang="es" rel="alternate" title="Español"> es </a> | -<a href="../ja/mod/worker.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | -<a href="../tr/mod/worker.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>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> -<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>worker.c</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 - less system resources than a process-based server. Yet it - retains much of the stability of a process-based server by - keeping multiple processes available, each with many threads.</p> - - <p>The most important directives used to control this MPM are - <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 - <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> -</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#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="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" /> <a href="#how-it-works">How it Works</a></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><a name="how-it-works" id="how-it-works">How it Works</a></h2> - <p>A single control process (the parent) is responsible for launching - child processes. Each child process creates a fixed number of server - threads as specified in the <code class="directive"><a href="../mod/mpm_common.html#threadsperchild">ThreadsPerChild</a></code> directive, as well - as a listener thread which listens for connections and passes them - to a server thread for processing when they arrive.</p> - - <p>Apache always tries to maintain a pool of <dfn>spare</dfn> or - idle server threads, which stand ready to serve incoming - 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 <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 <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 - <code class="directive"><a href="../mod/mpm_common.html#maxclients">MaxClients</a></code> directive. - The maximum number of active child processes is determined by - the <code class="directive"><a href="../mod/mpm_common.html#maxclients">MaxClients</a></code> - directive divided by the <code class="directive"><a href="../mod/mpm_common.html# threadsperchild"> - ThreadsPerChild</a></code> directive.</p> - - <p>Two directives set hard limits on the number of active child - processes and the number of server threads in a child process, - and can only be changed by fully stopping the server and then - starting it again. <code class="directive"><a href="../mod/mpm_common.html#serverlimit ">ServerLimit - </a></code> is a hard limit on the number of active child - processes, and must be greater than or equal to the - <code class="directive"><a href="../mod/mpm_common.html#maxclients">MaxClients</a></code> - directive divided by the <code class="directive"><a href="../mod/mpm_common.html# threadsperchild"> - ThreadsPerChild</a></code> directive. - <code class="directive"><a href="../mod/mpm_common.html#threadlimit">ThreadLimit</a></code> is a hard - limit of the number of server threads, and must be greater than - or equal to the <code class="directive"><a href="../mod/mpm_common.html#threadsperchild">ThreadsPerChild</a></code> directive. If - non-default values are specified for these directives, they - should appear before other <code class="module"><a href="../mod/worker.html">worker</a></code> directives.</p> - - <p>In addition to the set of active child processes, there may - be additional child processes which are terminating but where at - least one server thread is still handling an existing client - connection. Up to <code class="directive"><a href="../mod/mpm_common.html#maxclients">MaxClients</a></code> terminating processes - may be present, though the actual number can be expected to be - much smaller. This behavior can be avoided by disabling the - termination of individual child processes, which is achieved by - the following:</p> - - <ul> - <li>set the value of <code class="directive"><a href="../mod/mpm_common.html# maxrequestsperchild"> - MaxRequestsPerChild</a></code> to zero</li> - - <li>set the value of <code class="directive"><a href="../mod/mpm_common.html# maxsparethreads"> - MaxSpareThreads</a></code> to the same value as - <code class="directive"><a href="../mod/mpm_common.html#maxclients">MaxClients</a></code></li> - </ul> - - <p>A typical configuration of the process-thread controls in - the <code class="module"><a href="../mod/worker.html">worker</a></code> MPM could look as follows:</p> - - <div class="example"><p><code> - ServerLimit 16<br /> - StartServers 2<br /> - MaxClients 150<br /> - MinSpareThreads 25<br /> - MaxSpareThreads 75<br /> - ThreadsPerChild 25 - </code></p></div> - - <p>While the parent process is usually started as <code>root</code> - 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 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 - addition, unless <code class="program"><a href="../programs/suexec.html">suexec</a></code> is used, - these directives also set the privileges which will be inherited - by CGI scripts.</p> - - <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> -</div> -</div> -<div class="bottomlang"> -<p><span>Available Languages: </span><a href="../de/mod/worker.html" hreflang="de" rel="alternate" title="Deutsch"> de </a> | -<a href="../en/mod/worker.html" title="English"> en </a> | -<a href="../es/mod/worker.html" hreflang="es" rel="alternate" title="Español"> es </a> | -<a href="../ja/mod/worker.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | -<a href="../tr/mod/worker.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </a></p> -</div><div id="footer"> -<p class="apache">Copyright 2009 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>
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