Hi , So in our case we are dealing with a missing PI of DDF period 1 with 20 SU and there does not seem to be an easy way to solve this problem when it comes to correlating DB2 accounting data (101) with SMF 72. This is because which DDF transactions ended in which period is not stored in DB2 101 records. There are few other questions which I would like to get your insights on :
1)What does WLM consider as an ended transaction in case of DDF? A commit + abort or the entire thread? There can be multiple commits per thread. 2)As per my understanding converting SU to CPU time is done using the WLM SU/sec conversion factor. There is also a SRM su/sec published by IBM but i think R723MADJ is used. This WLM factor can be different based on the logical processor configuration of an LPAR. A DB2 data sharing member can be on different CECs and LPARs so for example defining 20 SU will translate to different amount of GCP time on different LPARs in a sysplex. Is my understanding correct here ? 3)I am keen to understand what will happen in the scenario of sub capacity processors where GCPs are slower than IIPs. Will WLM normalize the IIP service units before deciding period aging? Thanks Ss On Sat, Aug 31, 2024 at 4:20 PM Martin Packer <[email protected]> wrote: > If this weren’t the case Period Aging would work differently for (up to > )60% of DDF transactions (the zIIP ones) versus (at least) 40% (the GCP > ones). Indeed Period Aging wouldn’t work at all for the former (barring > zIIP-on-GCP). > > Oh, not to confuse this with the newer High Performance DBAT support – > which kills Period Aging for those DDF transactions. > > Cheers, Martin (coming back off vacation so late to the party) > > From: IBM Mainframe Discussion List <[email protected]> on behalf > of Dave Barry <[email protected]> > Date: Monday, 26 August 2024 at 17:05 > To: [email protected] <[email protected]> > Subject: Re: [EXTERNAL] WLM question : Is ziip service units counted in > period switching > "Duration is the amount of weighted SU (including zIIP) that a UOW (unit > of work) may consume before it is switched to the goals of the next > .period." > > Bear in mind that zIIP-eligible work can run on a GCP. > > -----Original Message----- > From: IBM Mainframe Discussion List <[email protected]> On Behalf > Of Dave Barry > Sent: Monday, August 26, 2024 11:36 AM > To: [email protected] > Subject: Re: [EXTERNAL] WLM question : Is ziip service units counted in > period switching O IBM-MAIN > > ---------------------------------------------------------------------- > 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 > > Unless otherwise stated above: > > IBM United Kingdom Limited > Registered in England and Wales with number 741598 > Registered office: PO Box 41, North Harbour, Portsmouth, Hants. 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
