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git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@81902 13f79535-47bb-0310-9956-ffa450edef68
109 lines
3.6 KiB
HTML
109 lines
3.6 KiB
HTML
<!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 module mod_status</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">Module mod_status</H1>
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The Status Module is only available in Apache 1.1 and later.<P>
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<H2>Function</H2>
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The Status module allows a server administrator to find out how well
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their server is performing. A HTML page is presented that gives
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the current server statistics in an easily readable form. If required
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this page can be made to automatically refresh (given a compatible
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browser). Another page gives a simple machine-readable list of the current
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server state.
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<P>
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The details given are:
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<UL>
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<LI>The number of children serving requests
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<LI>The number of idle children
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<LI>The status of each child, the number of requests that child has
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performed and the total number of bytes served by the child (*)
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<LI>A total number of accesses and byte count served (*)
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<LI>The time the server was started/restarted and the
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time it has been running for
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<LI>Averages giving the number of requests per second,
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the number of bytes served per second and the average number
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of bytes per request (*)
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<LI>The current percentage CPU used by each child and in total by
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Apache (*)
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<LI>The current hosts and requests being processed (*)
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</UL>
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A compile-time option must be used to display the details marked "(*)" as
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the instrumentation required for obtaining these statistics does not
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exist within standard Apache.
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<H2>Enabling Status Support</H2>
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To enable status reports only for browsers from the foo.com
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domain add this code to your <CODE>access.conf</CODE> configuration file
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<PRE>
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<Location /server-status>
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SetHandler server-status
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order deny,allow
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deny from all
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allow from .foo.com
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</Location>
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</PRE>
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<P>
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You can now access server statistics by using a Web browser to access the
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page <CODE>http://your.server.name/server-status</CODE>
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<P>
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Note that mod_status will only work when you are running Apache in
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<A HREF="core.html#servertype">standalone</A> mode and not
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<A HREF="core.html#servertype">inetd</A> mode.
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<H3>Automatic Updates</H3>
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You can get the status page to update itself automatically if you have
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a browser that supports "refresh". Access the page
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<CODE>http://your.server.name/server-status?refresh=N</CODE> to refresh the
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page every N seconds.
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<H3>Machine Readable Status File</H3>
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A machine-readable version of the status file is available by accessing the
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page <CODE>http://your.server.name/server-status?auto</CODE>. This is useful
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when automatically run, see the Perl program in the <CODE>/support</CODE>
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directory of Apache, <CODE>log_server_status</CODE>.
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<H2>Full Instrumentation</H2>
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To obtain full statistics you must compile Apache with a special
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directive. On some machines there may be a small performance loss
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if you do this. Try full statistics and see if you notice any
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difference. If you do please contact <A HREF="mailto:jim@apache.org">
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jim@apache.org</A> and tell us your configuration.
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<P>
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Do this by using the following run-time directive:
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<PRE>
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ExtendedStatus On
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</PRE>
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<BLOCKQUOTE>
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<STRONG>
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It should be noted that if <SAMP>mod_status</SAMP> is compiled into
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the server, its handler capability is available in <EM>all</EM>
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configuration files, including <EM>per</EM>-directory files
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(<EM>e.g.</EM>, <SAMP>.htaccess</SAMP>). This may have
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security-related ramifications for your site.
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</STRONG>
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</BLOCKQUOTE>
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<!--#include virtual="footer.html" -->
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</BODY>
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</HTML>
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