I am working with the Development LPAR (SC08D3). Below is the TSO service class definition for that LPAR.
Service Class Name . . . . . : TSOSC Description . . . . . . . . . TSO Production and Development Workload Name . . . . . . . . TSO (name or ?) Base Resource Group . . . . . ________ (name or ?) Cpu Critical . . . . . . . . . NO (YES or NO) I/O Priority Group . . . . . . NORMAL (NORMAL or HIGH) Honor Priority . . . . . . . . DEFAULT (DEFAULT or NO) Specify BASE GOAL information. Action Codes: I=Insert new period, E=Edit period, D=Delete period. -- Period -- ------------------- Goal ------------------- Action # Duration Imp. Description __ _ _________ _ ________________________________________ __ 1 500 1 90% complete within 00:00:00.060 __ 2 _________ 4 Execution velocity of 40 Next, is a mangled text view of the Development (SC08D3) LPAR definition. Customize Image Profiles: Z15A:SC08D3 : SC08D3 : Processor Turn on context sensitive help. Collapse Z15A:SC08D3 Collapse SC08D3 General Processor Security Storage Options Load Crypto Group Name <Not Assigned> Open or close the list box Logical Processor Assignments Dedicated processors Select Processor Type Initial Reserved Selected Central processors (CPs) 1 0 Selected z Integrated Information Processors (zIIPs) 1 0 Not Dedicated Processor Details for: CPs zIIPs CP Details Initial processing weight 60 1 to 999 Initial capping Enable workload manager Minimum processing weight 0 Maximum processing weight 0 Absolute Capping None Number of processors (0.01 to 255.0) 0.18 Sent with Proton Mail secure email. ------- Original Message ------- On Thursday, August 3rd, 2023 at 12:17 PM, Allan Staller <00000387911dea17-dmarc-requ...@listserv.ua.edu> wrote: > Classification: Confidential > > You did not say where the TSO response time issues were being observed. I > suspect, from the information provided it is on SC08D3(possible) or SC14D4 > (most likely). > > If you look, I suspect the majority of CPU consumption is from the *MSTR DB2 > address space. DB2 will charge this back to the "user". This address space is > most likely running in the SYSSTC Service class. > > I suggest you look at the service class definitions for TSO. At least 80% of > all transactions should end in TSO Service Class Period 1, 80 % of the rest > in TSO Service Class Period 2 (16%) and the remainder in TSO Service Class > period 3 (4 %). Another variation could be TSO Service Class Period 1 at 96% > and TSO Service Class Period 2 4%; No TSO Service Class Period 3. > > Depending on the scheme chosen above, except for the last TSO Service Class, > all should run as importance 1. They may have different performance goals, > but the importance should be 1. > > " From the activation profile for Development (SC08D3) the Processor > definition has the absolute Capping box Number of processors box set to > 0.18.”. This sentence does not make sense as written. > > HTH, > > -----Original Message----- > From: IBM Mainframe Discussion List IBM-MAIN@LISTSERV.UA.EDU On Behalf Of > rpinion865 > > Sent: Thursday, August 3, 2023 10:10 AM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: z/OS performance question > > [CAUTION: This Email is from outside the Organization. Unless you trust the > sender, Don’t click links or open attachments as it may be a Phishing email, > which can steal your Information and compromise your Computer.] > > 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 > lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ::DISCLAIMER:: > ________________________________ > The contents of this e-mail and any attachment(s) are confidential and > intended for the named recipient(s) only. 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