I'd reiterate what David Kreuter said: With sufficient storage and a
reasonably well-configured I/O subsystem, you should be able to sustain 90%
or greater CPU busy without impacting guest response time. Note that those
are not trivial provisos.
Marty
____________________
Martin Zimelis
Principal
maz/Consultancy
> -----Original Message-----
> From: The IBM z/VM Operating System
> [mailto:[EMAIL PROTECTED] On Behalf Of Richard Heritage
> Sent: Wednesday, October 25, 2006 12:30 PM
> To: [email protected]
> Subject: CPU Utilization Limit
>
> I know this is an "it depends" question, but I hope some of
> you can give
> me a very general answer. As an MVS guy, I'm used to being able to run
> the processor very close to or even at 100% without significant
> performance degradation. Assuming that everything is configured and
> tuned properly (a big assumption, I know), can VM drive the processor
> the same way? Our application people are used to other platforms that
> don't tolerate high CPU utilization so well and think things are going
> to start falling apart when we hit 80%. I'd like to reassure
> them--but
> only if it's accurate to do so! This is a WebSphere
> application running
> on multiple SUSE instances, with the data on DB2 under z/OS. Is it
> reasonable for me to expect--again, assuming everything else is
> right--to be able to run at 90+ percent without problems?
>
>
>
> Richard Heritage
> Lead Systems Software Engineer
> IT @ Johns Hopkins
>
