Yes, most likely I/O related. Any storage that CP references must be below the line. Doing any DIAG44? What is your I/O rate from the production server? Is your server machine in Simulation wait (yet) Can you graph the virtual machine i/o rate against the expanded storage rate? They should track almost 100%.
When you really start thrashing, you will get unexplained "slowness". At that point, you'll have to run in an LPAR, like others before you.... >Date: Wed, 28 Jul 2004 15:58:51 +0200 >Reply-To: Linux on 390 Port <[EMAIL PROTECTED]> >From: Pieter Harder <[EMAIL PROTECTED]> >Hello, > >we have zLinux running on VM as SAP R/3 app servers. One 2G >Vsize (production) and 5 1G Vsize (test/QA) machines in an 10G >lpar. I noticed that our production machine tends to try to pull >all it's storage below the bar. While the effect is not really >bad, it looks like a thrashing scenario to me. Pages are cycled >between main >2G, Xstor and main <2G all the time. Does anyone >have an idea why this would be happening? Can this all be I/O >related? I can t believe that as most I/O here is to the outside >world via a Vswitch and via Hipersockets to DB2/zOS in another >lpar. > >Best regards, >Pieter Harder > >[EMAIL PROTECTED] >tel +31-73-6837133 / +31-6-47272537 "If you can't measure it, I'm Just NOT interested!"(tm) /************************************************************/ Barton Robinson - CBW Internet: [EMAIL PROTECTED] Velocity Software, Inc Mailing Address: 196-D Castro Street P.O. Box 390640 Mountain View, CA 94041 Mountain View, CA 94039-0640 VM Performance Hotline: 650-964-8867 Fax: 650-964-9012 Web Page: WWW.VELOCITY-SOFTWARE.COM /************************************************************/ ---------------------------------------------------------------------- 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
