I lurk on IBM-Main, and I'm always awed by the knowledge here. You are treasure.
Sent from my iPhone On Dec 17, 2014, at 10:02 AM, Martin Packer <[email protected]> wrote: > 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: [email protected] > > Twitter / Facebook IDs: MartinPacker > Blog: > https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker > > > > From: L Hagedorn <[email protected]> > To: [email protected] > Date: 17/12/2014 12:54 > Subject: MIPS, CEC, LPARs, PRISM, WLM > Sent by: IBM Mainframe Discussion List <[email protected]> > > > > 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 [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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
