Response time goals for batch do not (IMO) make any sense. WLM is predicated on having enough samples to make an informed decision. If you only have 1 or 2 samples (ended transactions) in an interval, that is not statistically valid. I would suggest a velocity goal be used in its place.
If queue time is needed to be considered, the I would expand the suggestion to include WLM managed initiators. This will change the velocity calculation to include queue time as part of the delay. Suggested reading: ftp://public.dhe.ibm.com/s390/zos/wlm/WLMvelocity.pdf HTH, -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Gerhard Adam Sent: Wednesday, February 14, 2018 9:40 PM To: [email protected] Subject: Re: WLM and response time Well, this may seem like an obvious answer, but I can't tell if I'm confusing myself or missing something. If I use a long response time (like 10 minutes for batch), then I would think that I only consider that during the Performance Adjustment interval in which the transaction ends. Yet that raises the question that if I have multiple jobs in such a service class, then over what interval must they end to provide a meaningful metric? Assuming they would all end within a 10 second window seems implausible, so how can a response time goal realistically be managed at such high values? In addition I recently read that even transactions that haven't ended can be used in the evaluation of goals, but that doesn't make sense since, by definition, they haven't ended. Yet this is what percentile goals are supposed to represent. So I guess my question involves how a policy adjustment interval addresses transaction that run longer than the time between intervals, or is it merely that they are only examined during the interval they actually end in? Adam ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] 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. E-mail transmission is not guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or may contain viruses in transmission. The e mail and its contents (with or without referred errors) shall therefore not attach any liability on the originator or HCL or its affiliates. Views or opinions, if any, presented in this email are solely those of the author and may not necessarily reflect the views or opinions of HCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of authorized representative of HCL is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. Before opening any email and/or attachments, please check them for viruses and other defects. -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
