MaxKeepAliveRequests, MaxRequestsPerChild

2.Change the value of the parameter by starting with 100.

3.Save the changes and restart the IBM HTTP server.

The recommended method is to start with a size of 100, then increase as necessary. An HTTP error message of type 503 (a refused connection) is a good indicator for the need to increase the value.

There are two ways to find how many threads are being used under load. The following procedures show how this is done.

Checking for thread usage with the Windows 2000 Performance Monitor

Use the following procedure to check thread usage with the Windows 2000 Performance Monitor:

1.Select Start -> Programs -> Administrative Tools -> Performance Monitor.

11.In Performance Monitor, click Edit -> Add to chart. Then set the following:

•Object: IBM HTTP Server

•Instance: Apache

•Counter: Waiting for connection

To calculate the number of busy threads, subtract the number waiting (Windows 2000 Performance Monitor) from the total available (ThreadsPerChild).

Checking for thread usage using IBM HTTP Server server-status

Use the following procedure to check thread usage with IBM HTTP Server server-status:

1.Edit the IBM HTTP Server file httpd.conf by removing the comment character "#" from the following lines:

#LoadModule status_module modules/ApacheModuleStatus.dll

#<Location /server-status>

#SetHandler server-status

#</Location>

2.Save the changes and restart the IBM HTTP server.

In a Web browser, go to the following URL and click Reload to update status: http://yourhost/server-status. Alternatively, if the browser supports refresh, go to http://yourhost/server-status?refresh=5 to refresh every 5 seconds. You should see 5 requests currently being processed, 45 idle servers.