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From "Caldarale, Charles R" <Chuck.Caldar...@unisys.com>
Subject RE: CPU Spike Every 10 seconds
Date Wed, 10 Jan 2007 19:58:28 GMT
> From: Ashraf Mohamed [mailto:ashraf.mohamed@spanlink.com] 
> Subject: CPU Spike Every 10 seconds
> 
> What does Tomcat do that could cause a cpu spike of almost exactly 50%
> almost exactly every 10 seconds?

It's most likely the background processor thread for the Catalina
engine; look at the description for backgroundProcessorDelay here:
http://tomcat.apache.org/tomcat-5.5-doc/config/engine.html

It's doing things such as scanning for changes to files specified by
<WatchedResource> declarations.

 - Chuck


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