IBM Mainframe Discussion List <[email protected]> wrote on 10/10/2007 08:40:02 PM:
> The SAD screen, for the CP's, showed some spikes up around 60% as the > other LPARs came up. Not sure what to make of LPAR utilization for it > seems to always show 100%. > First, make sure you have PTFs installed for APARs OA18452, OA18348, OA15188 If you are then still seeing really high physical CP utilization when the MVS LPARs aren't running any workload, you could experiment with specifying SHORTWAITMIN=1000 or SHORTWAITMIN=2000 in your IEAOPTxx That's an undocumented parameter, so I'm not going to talk a lot about what it means here. The situations where I have seen it to be helpful usually involve a lot of IPLed but idle MVS LPARs on a machine which has a lot of physical CPs. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On > Behalf Of Jim Mulder > Sent: Wednesday, October 10, 2007 8:33 PM > To: [email protected] > Subject: Re: Logical to Physical CPU ratio ROT (was Re: IXC454I > messages) > > IBM Mainframe Discussion List <[email protected]> wrote on 10/10/2007 > > 07:48:26 PM: > > > Just out of curiosity, look at the System Activity Display (SAD, or > whatever it is called on these machines) on the SE or HMC, and see what > the physical CP utilization looks like while this is going on. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
