I don't see the DIST ADDRESS SPACE going runaway. What is feasible is DDF work - separately WLM classified as it should be - taking a big chunk of CPU. (And that work runs IN the DIST address space but hopefully not at its dispatching priority.) DIST address space itself going rogue would sound like a bug.
Lots of things determine whether this would lead to a separate Production LPAR being impacted, most notably whether Prod LPAR is above its share (as determined by weights). With DDF work this could affect either the GCP pool or the zIIP pool. There ARE interactions between WLM and PR/SM but generally not. Such interactions include if IRD Weight Management is active. And I see you already have several other answers - so it looks like you came to the right place. :-) Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Banking Center of Excellence, IBM +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker From: L Hagedorn <linda.haged...@gmail.com> To: IBM-MAIN@LISTSERV.UA.EDU Date: 17/12/2014 12:54 Subject: MIPS, CEC, LPARs, PRISM, WLM Sent by: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> Hi IBM-MAIN, We have a situation with multiple LPARS on a CEC, running DB2 asids prod, test, dev. It is claimed a runaway DB2 DIST asid on the DVLP LPAR is burning CPU and stealing MIPS from the PROD LPAR and affecting production. Others claim this is not possible due to Prism. Will someone provide an overview of how Prism influences or controls MIPS usage (CPU) across LPARs sharing the same CEC, what are the limiting or controlling factors (if any), and how can the behavior be measured or reported upon so I can explain this with supporting doc? Does WLM play a part in sharing CPU across LPARs? Any information or referrals to doc is appreciated. Thanks, Linda ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu 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 lists...@listserv.ua.edu with the message: INFO IBM-MAIN
