Let me start off by saying I am not a z/OS performance and capacity planning expert. If anything, I am a novice. I am looking for a trivial answer to a non-trivial question. We have a z15 (8562-T02) running three z/OS 2.4 LPAR's, Production (SC10D1), Development (SC08D3), and Sysprog (SC14D4). Below is information from the RMF Partition Report. My question/problem is this. On the Development LPAR, when a DB2 database restore job runs, the MVS Busy goes to 100% as seen from both SDSF DA and RMF CPU reports. Most of the CPU Busy goes to the DB2 restore job. The batch job runs in a discretionary service class, and TSO users run in a higher service class with goal mode. But, response time for the TSO users gets long, 3 to 5 seconds between enter keys, ISPF screen swaps etc.. Normally the TSO response time is sub-second. As you can see, the Development LPAR has one Logical CP defined. Based on the capping characteristics of Development as displayed below, would adding another Logical CP help TSO response time?
1 P A R T I T I O N D A T A R E P O R T PAGE 3 z/OS V2R4 SYSTEM ID SC10 DATE 08/01/2023 INTERVAL 14.59.992 RPT VERSION V2R4 RMF TIME 05.45.00 CYCLE 1.000 SECONDS - MVS PARTITION NAME SC10D1 PHYS PROC NUM 5 LP GROUP NAME N/A INITIAL CAP NO IMAGE CAPACITY 138 CP 2 2 LIMIT N/A LPAR HW CAP NO NUMBER OF CONFIGURED PARTITIONS 5 ICF 1 AVAILABLE N/A HW GROUP CAP NO WAIT COMPLETION NO IIP 2 2 ABS MSU CAP NO DISPATCH INTERVAL DYNAMIC MVS PARTITION NAME SC08D3 PHYS PROC NUM 5 LP GROUP NAME N/A INITIAL CAP NO IMAGE CAPACITY 10 CP 2 1 LIMIT N/A LPAR HW CAP YES NUMBER OF CONFIGURED PARTITIONS 5 ICF 1 AVAILABLE N/A HW GROUP CAP NO WAIT COMPLETION NO IIP 2 1 ABS MSU CAP NO DISPATCH INTERVAL DYNAMIC - ------------ PARTITION DATA ------------------ ----MSU---- --CAPPING--- NAME S BT WGT DEF ACT DEF WLM% NUM TYPE SC10D1 A N 999 138 27 N N N 0.0 2.0 CP SC08D3 A N 60 10 3 N Y N 0.0 1.0 CP (1) SC14D4 A N 18 4 2 N N N 0.0 1.0 CP TOTAL 1077 - From the activation profile for Development (SC08D3) the Processor definition has the absolute Capping box Number of processors box set to 0.18. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
