Re: How To Limit Tomcat CPU on IBM i

[Charles Wilt <charles.wilt@xxxxxxxxx>]

Do you have multiple oores?

Are you running 7.1?

If the answer to both is yes, take a look at Workload capping
http://pic.dhe.ibm.com/infocenter/iseries/v7r1m0/topic/rzaks/rzaksworkloadcapping.htm

HTH,
Charles


On Wed, Apr 23, 2014 at 8:09 AM, Jim Oberholtzer <
midrangel@xxxxxxxxxxxxxxxxx> wrote:

> Paul,
>
> Since this is all running in one partition, about the only way I can think
> of is to put a monitor on the system that whenever the Tomcat jobs spike
> over a certain percentage of CPU for a specified period of time, it drops
> the priority of those jobs to over 50.  A CL using some APIs or Management
> Central could do that for you.
>
> What OS version?
>
> --
> Jim Oberholtzer
> Chief Technical Architect
> Agile Technology Architects
>
>
> -----Original Message-----
> From: java400-l-bounces@xxxxxxxxxxxx [mailto:
> java400-l-bounces@xxxxxxxxxxxx]
> On Behalf Of Holm, Paul
> Sent: Tuesday, April 22, 2014 4:50 PM
> To: Java 400 List
> Subject: How To Limit Tomcat CPU on IBM i
>
> I'm running Tomcat 5.5 directly on the IBM i.  Periodically when running
> some code the CPU spikes to 99.9%.   We suspect it might be some infinite
> loops in certain cases and we are analyzing that.
>
> Tomcat is started from a CL command which calls the catalina400.sh
>
> How can I LIMIT the amount of CPU that Tomcat is allowed so it doesn't
> degrade performance for the other system users?
>
> Thanks, Paul Holm
> --
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