Hi to all, It is part of my duties to show to management z/OS performance daily and monthly based on SMF RMF records.
CPU% utilization averages, memory usage, MSU, I/O rates, transaction rates, etc. are usually easy to present and explain. You get Averages, 90th percentile, absolute maximum/minimum, etc. as measurement criterias. My problem is: I wish to show that our machines are heavily loaded or maximum loaded. My problem is that the different LPARs have their absolute maximum CPU% utilization at different hourly and 30 minute intervals. So LPAR 1 has 100% CPU utilization at 09:00, but LPAR 2 has 95% CPU utilization at say 13:00. If I combine these values for the day, they're sometimes over 100% which is undesirable or difficult to explain. Sometimes I see those max CPU% drifts very far far away from the usual average CPU% utilization on one or more LPARs at a given interval, but not always at the same time. Question: how do you performance guys and gals present those maximums? Or how do you prove that machines are heavily used? Do you use averages of those maximum CPU% utilization or what do you use? Do you combine all the LPARs and then work out the max? Any trending or statistical analysis methods to consider? I'm using RMF and a commercial product (no SAS) to process those SMF RMF records daily and monthly. z/OS v1.13. Many thanks in advance. Groete / Greetings Elardus Engelbrecht ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
