Analytic

Thursday, November 13, 2008

Apache Server Status

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 (*)
The lines marked "(*)" are only available if ExtendedStatus is On.

To enable status reports only for browsers from the foo.com domain add this code to your /etc/apache2/apache2conf configuration file:

"Location /server-status"
SetHandler server-status
Order Deny,Allow
Deny from all
Allow from foo.com

"/Location"

(change " with <>)

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

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.

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.

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