> From: Matthew Laird [mailto:[EMAIL PROTECTED]
> Subject: Tomcat not using multiple cores
>
> Unfortunately what then occurs is all other threads suddenly become
> unusably slow.  The entire web application grinds to a halt until this
> thread that's running hot completes.

We've run Tomcat on 32 cores and can keep them all busy - the problem is almost 
certainly in your webapp.  Take a thread dump (with locking information 
enabled) and see what everyone is waiting for.  The jstack utility is good for 
this.

> I'm not sure how to convince the Tomcat/Java container to spread its
> threads among the cores.

Convince your application; it's not Tomcat or the JVM.

 - Chuck


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