HTTPD Processes Consume High Levels Of CPU on AIX (Doc ID 1268511.1)

Last updated on MARCH 08, 2017

Applies to:

Oracle HTTP Server - Version 10.1.2.0.0 to 10.1.3.5.0 [Release AS10gR2 to AS10gR3]
Enterprise Manager Base Platform - Version 10.2.0.5 and later
IBM AIX on POWER Systems (64-bit)

Symptoms

Oracle HTTP Server (OHS) 10.1.2.x is installed as part of an OracleAS 10g or Grid Control 10.2 Oracle Home on AIX.

After a period of trouble-free running, one or more of the child HTTPD processes begins to consume an abnormally high percentage of the available CPU. When measured using an AIX monitoring tool such as topas, the HTTPD processes are amongst the most resource-hungry processes on the server. The CPU continues to be used, even when OHS is idle and not processing any incoming requests.

The trigger for HTTPD to consume CPU  is varied but it normally coincides with a loading of the server. This loading could be for any process on the machine, not necessarily an HTTP Server-related activity.

Cause

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