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:[email protected]] On Behalf Of Barton Robinson Sent: Thursday, March 04, 2010 11:09 AM To: [email protected] 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: [email protected]<mailto:[email protected]> > Please ignore company inserted HIPAA disclaimer below ----------------------------------------- This e-mail and any attachments may contain CONFIDENTIAL information, including PROTECTED HEALTH INFORMATION. If you are not the intended recipient, any use or disclosure of this information is STRICTLY PROHIBITED; you are requested to delete this e-mail and any attachments, notify the sender immediately, and notify the LabCorp Privacy Officer at [email protected] or call (877) 23-HIPAA. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
