The CPU/L field is showing you two things: CPU utilization from z/OSes point of view, and the CPU utilization from PR/SM's point of view. You had the system capped, and were using all of the resources that were available to you at the z/OS level. That's what the 100 means. z/OS was using all of the resources that were being made available to it. From PR/SM's point of view, however, there was available physical CPU time it could have been dispatching logical CPs to, but the cap prevented it from doing so. That's what the 46 means.
Basically, you are trying to do more work to do than you're giving z/OS capacity to run, so yes, things are going to hang. If you're going to run this way frequently, you need to make sure your WLM policy is correct, based on business needs. See also https://www.ibm.com/support/knowledgecenter/SSLTBW_1.13.0/com.ibm.zos.r13.erba900/erbzpm9093.htm --- Kevin McKenzie External Phone: 845-435-8282, Tie-line: 8-295-8282 z/OS Test Services - Test Architect, Provisioning IBM Mainframe Discussion List <[email protected]> wrote on 04/21/2017 01:49:34 AM: > From: Mohamed Gomaa <[email protected]> > To: [email protected] > Date: 04/21/2017 01:50 AM > Subject: CPU/L in SDSF > Sent by: IBM Mainframe Discussion List <[email protected]> > > We run up to situation that no one get any CPU for all users CICS, > TSO everyone and in SDSF panel I see CPU/L is 100/46. While in this > CEC only one LPAR is up and running, I have two other LPARs one for > IFL and the other one for ICF, who else eat my CPU, I am capping > this LPAR to 60 MSUs. > I changed the capping point dynamically to 100 MSUs the value was 87/65. > I changed it to 80 MSUs, it came to 55/55 which I understand is ok. > Any one has any explanation > > By the way this not happened all the time it happened at 11:30 AM in > one day in one CEC and around 12:00 PM the second day in another CEC > and the two CECs are in one Production Sysplex > I did not see any message in the log which can guide me. > > Thanks dears > > Mohamed > > Sent from my iPhone > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
