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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:01:30 +0000
commit6beeb1b708550be0d4a53b272283e17e5e35fe17 (patch)
tree1ce8673d4aaa948e5554000101f46536a1e4cc29 /docs/manual/mod/mpm_winnt.html.en
parentInitial commit. (diff)
downloadapache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.tar.xz
apache2-6beeb1b708550be0d4a53b272283e17e5e35fe17.zip
Adding upstream version 2.4.57.upstream/2.4.57
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<p class="apache">Apache HTTP Server Version 2.4</p>
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+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <a href="./">Modules</a></div>
+<div id="page-content">
+<div id="preamble"><h1>Apache MPM winnt</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../de/mod/mpm_winnt.html" hreflang="de" rel="alternate" title="Deutsch">&nbsp;de&nbsp;</a> |
+<a href="../en/mod/mpm_winnt.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mpm_winnt.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ja/mod/mpm_winnt.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a></p>
+</div>
+<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Multi-Processing Module optimized for Windows NT.</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_winnt_module</td></tr>
+<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mpm_winnt.c</td></tr></table>
+<h3>Summary</h3>
+
+ <p>This Multi-Processing Module (MPM) is the default for the
+ Windows NT operating systems. It uses a single control process
+ which launches a single child process which in turn creates
+ threads to handle requests</p>
+
+ <p>Capacity is configured using the
+ <code class="directive"><a href="../mod/mpm_common.html#threadsperchild">ThreadsPerChild</a></code> directive,
+ which sets the maximum number of concurrent client connections.</p>
+
+ <p>By default, this MPM uses advanced Windows APIs for accepting
+ new client connections. In some configurations, third-party products
+ may interfere with this implementation, with the following messages
+ written to the web server log:</p>
+
+ <div class="example"><p><code>
+ Child: Encountered too many AcceptEx faults accepting client connections.<br />
+ winnt_mpm: falling back to 'AcceptFilter none'.
+ </code></p></div>
+
+ <p>The MPM falls back to a safer implementation, but some client requests
+ were not processed correctly. In order to avoid this error, use
+ <code class="directive"><a href="../mod/core.html#acceptfilter">AcceptFilter</a></code> with accept filter
+ <code>none</code>.</p>
+
+ <pre class="prettyprint lang-config">AcceptFilter http none
+AcceptFilter https none</pre>
+
+
+ <p><em>In Apache httpd 2.0 and 2.2,
+ <code class="directive">Win32DisableAcceptEx</code> was used for this purpose.</em></p>
+
+ <p>The WinNT MPM differs from the Unix MPMs such as worker and event
+ in several areas:</p>
+
+ <ul>
+ <li>When a child process is exiting due to shutdown, restart, or
+ <code class="directive"><a href="../mod/mpm_common.html#maxconnectionsperchild">MaxConnectionsPerChild</a></code>,
+ active requests in the exiting process have
+ <code class="directive"><a href="../mod/core.html#timeout">TimeOut</a></code> seconds to finish before
+ processing is aborted. Alternate types of restart and shutdown are not
+ implemented.</li>
+
+ <li>New child processes read the configuration files instead of
+ inheriting the configuration from the parent. The behavior will
+ be the same as on Unix if the child process is created at startup
+ or restart, but if a child process is created because the prior
+ one crashed or reached
+ <code class="directive"><a href="../mod/mpm_common.html#maxconnectionsperchild">MaxConnectionsPerChild</a></code>,
+ any pending changes to the configuration will become active in the
+ child at that point, and the parent and child will be using a
+ different configuration. If planned configuration changes have been
+ partially implemented and the current configuration cannot be
+ parsed, the replacement child process cannot start up and the server
+ will halt. Because of this behavior, configuration files should not
+ be changed until the time of a server restart.</li>
+
+ <li>The <code>monitor</code> and <code>fatal_exception</code> hooks
+ are not currently implemented.</li>
+
+ <li><code class="directive">AcceptFilter</code> is implemented in the MPM
+ and has a different type of control over handling of new connections.
+ (Refer to the <code class="directive"><a href="../mod/core.html#acceptfilter">AcceptFilter</a></code>
+ documentation for details.)</li>
+ </ul>
+
+</div>
+<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3 class="directives">Directives</h3>
+<ul id="toc">
+<li><img alt="" src="../images/right.gif" /> <a href="core.html#acceptfilter">AcceptFilter</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#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#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#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>
+</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__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mpm_winnt">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mpm_winnt">Report a bug</a></li></ul><h3>See also</h3>
+<ul class="seealso">
+<li><a href="../platform/windows.html">Using Apache HTTP Server on Microsoft Windows</a></li>
+<li><a href="#comments_section">Comments</a></li></ul></div>
+
+</div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../de/mod/mpm_winnt.html" hreflang="de" rel="alternate" title="Deutsch">&nbsp;de&nbsp;</a> |
+<a href="../en/mod/mpm_winnt.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mpm_winnt.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ja/mod/mpm_winnt.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</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&amp;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 Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
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