diff options
Diffstat (limited to 'rubbos/app/httpd-2.0.64/docs/manual/vhosts/fd-limits.html.en')
| -rw-r--r-- | rubbos/app/httpd-2.0.64/docs/manual/vhosts/fd-limits.html.en | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/docs/manual/vhosts/fd-limits.html.en b/rubbos/app/httpd-2.0.64/docs/manual/vhosts/fd-limits.html.en new file mode 100644 index 00000000..4649f65f --- /dev/null +++ b/rubbos/app/httpd-2.0.64/docs/manual/vhosts/fd-limits.html.en @@ -0,0 +1,133 @@ +<?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" /> +<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /> +<link href="../images/favicon.ico" rel="shortcut icon" /></head> +<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="<-" 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="./">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"> en </a> | +<a href="../ja/vhosts/fd-limits.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | +<a href="../ko/vhosts/fd-limits.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | +<a href="../tr/vhosts/fd-limits.html" hreflang="tr" rel="alternate" title="Türkçe"> tr </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"><VirtualHost></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# 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\" %>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 < /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"> en </a> | +<a href="../ja/vhosts/fd-limits.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> | +<a href="../ko/vhosts/fd-limits.html" hreflang="ko" rel="alternate" title="Korean"> ko </a> | +<a href="../tr/vhosts/fd-limits.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>
\ No newline at end of file |