And possibly checking to see if any zIIP eligible work is actually on the Speciality Processor or can go to a SP. Also sounds like a 4HRA event where I would have a look at makeup during 4HRA to see what Service Classes are contributing, and drill down and tune from there, if necessary.HTHSent from my Verizon, Samsung Galaxy smartphone -------- Original message --------From: Martin Packer <martin_pac...@uk.ibm.com> Date: 3/14/24 12:10 (GMT-05:00) To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: WLM and DDF enclaves They should be below Db2 Engine in the hierarchy…IRLM should be in SYSSTC.DBM1, MSTR, DIST should be in Importance 1, CPU Critical.DDF transactions should be Importance 2 on downwards.Right now you have DDF work fighting with Db2 – in whatever shaped boxing ring. 😊Cheers, MartinFrom: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Jaime Fernandez <000005f045ad6641-dmarc-requ...@listserv.ua.edu>Date: Thursday, 14 March 2024 at 14:26To: IBM-MAIN@LISTSERV.UA.EDU <IBM-MAIN@LISTSERV.UA.EDU>Subject: [EXTERNAL] WLM and DDF enclavesHi fellow listers,Newcomer here, so... I hope my question makes sense.We have some amount of business critical distributed online transactions, running on enclaves into a Db2 zOS subsystem. Our current WLM configuration assigns them a specific service class with importance 1 and a velocity goal.We have been observing quite poor performance index for this service class (and awful response times for those transactions) whenever the lpar shows high cpu usage (on or around 100%) and specially when capping is on. Performance index stays between 1 and 2 most of the time, with peaks over 40.From what I have read so far, I understand velocity goals can be tricky for short-term processes, and that gets worse with fewer logical processors. Which happens to be our case, last year we brought in a z16 with less capacity and processors than the previous machine.So, in your experience, could be a good idea switching to a response time goal?Any insights would be most appreciated.Jaime----------------------------------------------------------------------For IBM-MAIN subscribe / signoff / archive access instructions,send email to lists...@listserv.ua.edu with the message: INFO IBM-MAINUnless otherwise stated above:IBM United Kingdom LimitedRegistered in England and Wales with number 741598Registered office: PO Box 41, North Harbour, Portsmouth, Hants. PO6 3AU----------------------------------------------------------------------For IBM-MAIN subscribe / signoff / archive access instructions,send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
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