Look at the TS part of https://share.confex.com/share/116/webprogram/Handout/Session8269/SHARE%20Anaheim%20CICS%20Performance%20Tutorial%20-%20Other%20Tuning%20Areas%2002102011.pdf
It's been several years, but I had an installation where TS was heavily used. It had used MAIN storage, but as the system grew, it would cause SOS, so it was changed to AUX, but not given enough buffers, so it severely impacted performance. Note the part above that talks about TS uses delayed write to the VSAM file. Note also that TS should be TEMPORARY, it's not for long term storage. The CICS statistics program can be used to report on TS usage, but I don't remember the format. I was able to determine that I had S average sessions retaining TS data, each session could be contained in B TS buffers, so I allocated (S * B) * 1.5 TS buffers. TS VSAM writes went down by over 90%, but TS was there if there were abandoned sessions leaving data. Net result was I got back to BETTER than TS Main performance, most of the data was never written to VSAM, and it used a lot less main storage. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Sankaranarayanan, Vignesh Sent: Monday, June 20, 2016 4:02 AM To: [email protected] Subject: CICS - TS MAIN, AUX question Hi Folks, I've been seeing a lot of TS buffer and string waits in some of my CICS regions, and also noticed that I can benefit by increasing the CISIZE of TS AUX. Is there any way for me to calculate the CPU and I/O consumed/wasted on string & buffer waits BEFORE implementing this change. This way, I can say that 'x' system resources was saved by doing this basic fine-tuning task. Happy to look into SMF as well but I reckon CICS SMF is compressed and I therefore can't read it manually. Thanks in advance! - Vignesh Mainframe Infrastructure MARKSANDSPENCER.COM ________________________________ Unless otherwise stated above: Marks and Spencer plc Registered Office: Waterside House 35 North Wharf Road London W2 1NW Registered No. 214436 in England and Wales. Telephone (020) 7935 4422 Facsimile (020) 7487 2670 www.marksandspencer.com Please note that electronic mail may be monitored. This e-mail is confidential. If you received it by mistake, please let us know and then delete it from your system; you should not copy, disclose, or distribute its contents to anyone nor act in reliance on this e-mail, as this is prohibited and may be unlawful. ---------------------------------------------------------------------- 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
