Any idea what the utilization of the excessive thread is on an intel or
"P" server? If the CPU GHz requirement is similiar, then it's the z10
(and capacity issues) and you need more IFLs. If the GHz CPU requirement
is much higher on "z", then it's either IBM Java or Weblogic. I've not
seen or heard of any performance studies done for weblogic.
Carson, Brad wrote:
Barton,
Well, we are using the z/VM performance Toolkit and BMC Mainview for our
monitoring on this lpar.
This is how we were able to get down to the which guest is behaving bad
and the threads within that
guest that are giving us this heartburn. In all cases the excessive CPU
use is coming from a WebLogic
thread using the IBM Java.
I was hoping that someone else had seen this type of issue before and might
provide some more insight.
Our application folks keep wanting to blame z/VM and the z10 hardware
instead of looking at their code.
/Brad
-----Original Message-----
From: Linux on 390 Port [mailto:linux-...@vm.marist.edu] On Behalf Of Barton
Robinson
Sent: Thursday, March 04, 2010 11:09 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: Poor WebLogic Performance
IF you have a good performance monitor, you would know exactly what
process on what server is using CPU.
With zVPS (ESALPS), on one screen, you can see ALL the top processes
across your entire Linux farm, with one PFK, you can sort them by cpu.
Knowing where your cpu is going means you can do capacity planning,
solve problems, and know when things change.
Running without a good performance monitor is is like driving a car
across the rockies without a gas gauge, you will run out of gas, you
just don't know if it will be at a good time or a bad time.
Carson, Brad wrote:
We've begun working with Oracle WebLogic running on RHEL under z/VM. We are
seeing very poor performance with these guests and z/VM is constantly running
at 100% CPU when these guests are active. It looks to us that something in any
of our WebLogic guests is spinning on CPU. Response time in the guest is poor
and WebLogic response is worse.
Here are some of the particulars:
z/VM is at 5.4.0
RHEL is at 5.3
IBM Java (in the guests) is at 1.6.0
WebLogic is 10.3 (I've been told)
Any assistance in trying to get to the bottom of this issue would be greatly
appreciated.
Brad S. Carson
Mainframe Technical Support
Laboratory Corporation of America
Phone: 336-436-8294
email: cars...@labcorp.com<mailto:cars...@labcorp.com>
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