I have a zIIP Capacity Planning presentation - which I last gave yesterday in London at Z Technical University in London. It might well be of use.
Hint: You don’t want to go anywhere near 100% zIIP Pool Utilisation. Cheers, Martin Sent from my iPad > On 18 May 2018, at 14:37, Scott Chapman <[email protected]> wrote: > > Since you have at least the RMF post processor reports available to you, the CPU Activity report is a high-level place to start. In particular I would start at the Partition Data Report section. Look for the total physical utilization of the zIIP(s). > > That's not the only place you may see an indication of a problem. I.E. your zIIP (or your GPs for that matter) may be much less than 100% busy and you may still be having performance problems. There's lots of things to consider. > > One example is that the RMF interval length can hide spikes that may be causing problems. E.G. the 15 minute average utilization may be 40% busy, but that may be because it's 100% busy for a solid 5 minutes, and mostly unused for the remainder of the interval. Looking at the RMF III panels interactively can be useful to help see this. (And there's some other very useful SMF records as well.) > > Or maybe the LPAR weights are not correct for the workload and your business needs. > > Or maybe the WLM policy is not protecting/helping the work that really needs to be protected/helped. > > Or maybe it's not so much a zIIP capacity problem as it is a GP capacity issue. > > Regardless, we're always happy to do a free cursory performance review. We often find "interesting" things during those reviews. See: https://www.pivotor.com/cursoryReview.html > > Scott Chapman > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN >Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
