One approach is to set it high and then gradually lower it, checking for time spent in "Wait For First Dispatch" versus "Wait For Subsequent Dispatch" in Monitor Trace.
A bit labour- and data-intensive but reasonable for a relatively accurate answer. Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Banking Center of Excellence, IBM +44-7802-245-584 email: martin_pac...@uk.ibm.com Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker From: Lizette Koehler <stars...@mindspring.com> To: IBM-MAIN@LISTSERV.UA.EDU Date: 27/10/2014 04:48 Subject: Re: Setting a proper CICS MXT Value Sent by: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> You might want to, if you have not done so, join the CICS list for this type of question. When posting to the CICS list include the level of CICS. To join, use this URL: http://www.listserv.uga.edu/archives/cics-l.html Lizette > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On > Behalf Of Alex Wang > Sent: Sunday, October 26, 2014 9:15 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Setting a proper CICS MXT Value > > Dear All, > > First of all, please correct me I'm wrong to post this topic here. > > This is a question about how to set a proper CICS MXT value. > > CICS Performance guide shows me that: > ----------------------------------------------------------------------------- > Initially, set MXT to the number of concurrent user tasks that you require in your > system by totaling the following values: > 1. The number of concurrent long-running tasks 2. Each terminal running > conversational tasks 3. An estimate of the number of concurrent tasks from > terminals running nonconversational tasks 4. An estimate of the number of > concurrent nonterminal tasks. > ----------------------------------------------------------------------------- > I can estimate the number of concurrent long-running tasks. But for the number > 2,3 and 4, I have no idea about how to estimate them. Could you please show me > some lights on how to figuring them out? > > In fact, my major concern is how to evaluate a proper MXT value based on current > workload. > Is there any factors which could be used for this estimation? > > Many thanks for your help! > > Alex > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu 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 lists...@listserv.ua.edu with the message: INFO IBM-MAIN
