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Hi, the attachment includes a reworked Apache manual with the new virtual host documentation. As Dean suggested I created a new directory named 'vhosts' and moved the updated vhosts-in-depth etc. documents into the new directory, renamed them and updated all other documents which refered to the old docs (at least I tried to find all documents...). Submitted by: Lars Eilebrecht <sfx@unix-ag.org> Reviewed by: Martin Kraemer git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@79568 13f79535-47bb-0310-9956-ffa450edef68
60 lines
2.0 KiB
Plaintext
60 lines
2.0 KiB
Plaintext
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<html>
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<head>
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<title>Apache Server Virtual Host Support</title>
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</head>
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<!-- Background white, links blue (unvisited), navy (visited), red (active) -->
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<BODY
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#000080"
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ALINK="#FF0000"
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>
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<!--#include virtual="header.html" -->
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<h1 ALIGN="CENTER">File Descriptor Limits</h1>
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<P>
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When using a large number of Virtual Hosts, Apache may run out of available
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file descriptors (sometimes called <cite>file handles</cite> if each Virtual
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Host specifies different log files.
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The total number of file descriptors used by Apache is one for each distinct
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error log file, one for every other log file directive, plus 10-20 for
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internal use. Unix operating systems limit the number of file descriptors that
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may be used by a process; the limit is typically 64, and may usually be
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increased up to a large hard-limit.
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<p>
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Although Apache attempts to increase the limit as required, this
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may not work if:
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<ol>
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<li>Your system does not provide the setrlimit() system call.
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<li>The setrlimit(RLIMIT_NOFILE) call does not function on your system
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(such as Solaris 2.3)
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<li>The number of file descriptors required exceeds the hard limit.
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<li>Your system imposes other limits on file descriptors, such as a limit
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on stdio streams only using file descriptors below 256. (Solaris 2)
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</ol>
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In the event of problems you can:
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<ul>
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<li>Reduce the number of log files; don't specify log files in the VirtualHost
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sections, but only log to the main log files.
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<li>If you system falls into 1 or 2 (above), then increase the file descriptor
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limit before starting Apache, using a script like
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<blockquote><code>
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#!/bin/sh <br>
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ulimit -S -n 100 <br>
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exec httpd</code></blockquote>
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</ul>
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<P>
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Please see the
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<A HREF="../misc/descriptors.html">Descriptors and Apache</A>
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document containing further details about file descriptor problems and how
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they can be solved on your operating system.
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</P>
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<!--#include virtual="footer.html" -->
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</body></html>
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