SETSYS is what you want to review 1) Do you have HSM in a plex or a single CPU? 2) How did you set up SPACE MGMT, Primary and Secondary? 3) Are you using FSM for migration? 4) How are your management classes set up? 5) This gets tricky, how often are RECALLs done? 6) Are you using Common Recall Queue? It needs a CF 7) What is the performance/priority for HSM in WLM
These are somethings you can review. HSM can take a lot of resources for Migration/Recall/Backup/Dumps and ABARS if you use that You need to see how it is set up to make sense of the consumption Lizette -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Feller, Paul Sent: Monday, April 27, 2020 8:32 AM To: [email protected] Subject: Re: DFSMShsm high CPU consumption [EXTERNAL] I don't recall how you set it up in HSM, but one thing to look at is how many tasks we are running at one time. As an example you can have several tasks running to do migrations during primary space management. So you could look at the possibility of reducing the number of tasks running during primary space management. Thanks.. Paul Feller AGT Mainframe Technical Support -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Arye Shemer Sent: Monday, April 27, 2020 6:27 AM To: [email protected] Subject: DFSMShsm high CPU consumption [EXTERNAL] Hello forumers, IHAC complaining about high CPU consumption by DFSMShsm. Customer has no HSM experts and saying that while running HSM backups, Recycle, and several other HSM activities the CPU consumption rising to 100%. This high CPU consumption interfere with other higher importance online jobs and cause timeouts. Customer is willing to let the HSM activities (backups and maintenance) take longer in order to reduce the CPU consumption. Which HSM parameters we should investigate in order to achieve this goal. I assume that WLM is also need to be looked at to reduce the priority of the HSM tasks. Your directions and sharing your experience would be in great help, Thank you, Arye Shemer. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- Please note: This message originated outside your organization. Please use caution when opening links or attachments. ---------------------------------------------------------------------- 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
