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-<?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>File Descriptor Limits - 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" />
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-<body id="manual-page" class="no-sidebar"><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="&lt;-" alt="&lt;-" src="../images/left.gif" /></a></div>
-<div id="path">
-<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 2.0</a> &gt; <a href="./">Virtual Hosts</a></div><div id="page-content"><div id="preamble"><h1>File Descriptor Limits</h1>
-<div class="toplang">
-<p><span>Available Languages: </span><a href="../en/vhosts/fd-limits.html" title="English">&nbsp;en&nbsp;</a> |
-<a href="../ja/vhosts/fd-limits.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
-<a href="../ko/vhosts/fd-limits.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
-<a href="../tr/vhosts/fd-limits.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</a></p>
-</div>
-
-
- <p>When using a large number of Virtual Hosts, Apache may run
- out of available file descriptors (sometimes called <cite>file
- handles</cite>) if each Virtual Host specifies different log
- files. The total number of file descriptors used by Apache is
- one for each distinct error log file, one for every other log
- file directive, plus 10-20 for internal use. Unix operating
- systems limit the number of file descriptors that may be used
- by a process; the limit is typically 64, and may usually be
- increased up to a large hard-limit.</p>
-
- <p>Although Apache attempts to increase the limit as required,
- this may not work if:</p>
-
- <ol>
- <li>Your system does not provide the <code>setrlimit()</code>
- system call.</li>
-
- <li>The <code>setrlimit(RLIMIT_NOFILE)</code> call does not
- function on your system (such as Solaris 2.3)</li>
-
- <li>The number of file descriptors required exceeds the hard
- limit.</li>
-
- <li>Your system imposes other limits on file descriptors,
- such as a limit on stdio streams only using file descriptors
- below 256. (Solaris 2)</li>
- </ol>
-
- <p>In the event of problems you can:</p>
-
- <ul>
- <li>Reduce the number of log files; don't specify log files
- in the <code class="directive"><a href="../mod/core.html#virtualhost">&lt;VirtualHost&gt;</a></code>
- sections, but only log to the main log files. (See <a href="#splitlogs">Splitting up your log files</a>, below, for more
- information on doing this.)</li>
-
- <li>
- If you system falls into 1 or 2 (above), then increase the
- file descriptor limit before starting Apache, using a
- script like
-
- <div class="example"><p><code>
- <code>#!/bin/sh<br />
- ulimit -S -n 100<br />
- exec httpd</code>
- </code></p></div>
- </li>
- </ul>
-
- <p>Please see the <a href="../misc/descriptors.html">Descriptors and Apache</a>
- document containing further details about file descriptor
- problems and how they can be solved on your operating
- system.</p>
-
-</div>
-<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
-<div class="section">
-<h2><a name="splitlogs" id="splitlogs">Splitting up your log files</a></h2>
-
-<p>If you want to log multiple virtual hosts to the same log file, you
-may want to split up the log files afterwards in order to run
-statistical analysis of the various virtual hosts. This can be
-accomplished in the following manner.</p>
-
-<p>First, you will need to add the virtual host information to the log
-entries. This can be done using the <code class="directive"><a href="../mod/mod_log_config.html#&#10;logformat">
-LogFormat</a></code>
-directive, and the <code>%v</code> variable. Add this to the beginning
-of your log format string:</p>
-
-<div class="example"><p><code>
-LogFormat "%v %h %l %u %t \"%r\" %&gt;s %b" vhost<br />
-CustomLog logs/multiple_vhost_log vhost
-</code></p></div>
-
-<p>This will create a log file in the common log format, but with the
-canonical virtual host (whatever appears in the
-<code class="directive"><a href="../mod/core.html#servername">ServerName</a></code> directive) prepended to
-each line. (See <code class="directive"><a href="../mod/mod_log_config.html#custom log formats">Custom Log Formats</a></code> for
-more about customizing your log files.)</p>
-
-<p>When you wish to split your log file into its component parts (one
-file per virtual host) you can use the program <code><a href="../programs/other.html">split-logfile</a></code> to accomplish
-this. You'll find this program in the <code>support</code> directory
-of the Apache distribution.</p>
-
-<p>Run this program with the command:</p>
-
-<div class="example"><p><code>
-split-logfile &lt; /logs/multiple_vhost_log
-</code></p></div>
-
-<p>This program, when run with the name of your vhost log file, will
-generate one file for each virtual host that appears in your log file.
-Each file will be called <code>hostname.log</code>.</p>
-
-</div></div>
-<div class="bottomlang">
-<p><span>Available Languages: </span><a href="../en/vhosts/fd-limits.html" title="English">&nbsp;en&nbsp;</a> |
-<a href="../ja/vhosts/fd-limits.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
-<a href="../ko/vhosts/fd-limits.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
-<a href="../tr/vhosts/fd-limits.html" hreflang="tr" rel="alternate" title="Türkçe">&nbsp;tr&nbsp;</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>
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