From: The IBM z/VM Operating System on behalf of Richard Heritage
Sent: Wed 10/25/2006 12:30 PM
To: [email protected]
Subject: [IBMVM] 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
