Apache模块 mod_status

概述

The Status module allows a server administrator to find out how well their server is performing. A HTML page is presented that gives the current server statistics in an easily readable form. If required this page can be made to automatically refresh (given a compatible browser). Another page gives a simple machine-readable list of the current server state.

The details given are:

• The number of worker serving requests
• The number of idle worker
• The status of each worker, the number of requests that worker has performed and the total number of bytes served by the worker (*)
• A total number of accesses and byte count served (*)
• The time the server was started/restarted and the time it has been running for
• Averages giving the number of requests per second, the number of bytes served per second and the average number of bytes per request (*)
• The current percentage CPU used by each worker and in total by Apache (*)
• The current hosts and requests being processed (*)

A compile-time option must be used to display the details marked "(*)" as the instrumentation required for obtaining these statistics does not exist within standard Apache.

Enabling Status Support

To enable status reports only for browsers from the foo.com domain add this code to your httpd.conf configuration file

    <Location /server-status>

    SetHandler server-status

    Order Deny,Allow

    Deny from all

    Allow from .foo.com

    </Location>

You can now access server statistics by using a Web browser to access the page http://your.server.name/server-status

Automatic Updates

You can get the status page to update itself automatically if you have a browser that supports "refresh". Access the page http://your.server.name/server-status?refresh=N to refresh the page every N seconds.

Machine Readable Status File

A machine-readable version of the status file is available by accessing the page http://your.server.name/server-status?auto. This is useful when automatically run, see the Perl program in the /support directory of Apache, log_server_status.

It should be noted that if mod_status is compiled into the server, its handler capability is available in all configuration files, including per-directory files (例如，.htaccess). This may have security-related ramifications for your site.

ExtendedStatus 指令

This setting applies to the entire server, and cannot be enabled or disabled on a virtualhost-by-virtualhost basis. The collection of extended status information can slow down the server.