When assessing how well a WLM policy protects key work it’s necessary to understand how much CPU is used at each importance level. \ If there is very little work at a lower importance (higher importance number) a CPU crunch will leave work at this importance level vulnerable to CPU queuing. Let me give aContinue reading “What’s Important? CICS Transaction vs Region Goals”
Tag Archives: WLM
Two Of These Are Not Like The Others
They were simpler times back then. “Back when?” You might ask. When PR/SM got started – in the mid 1980’s – a machine might have two or three LPARs. Similarly, when Parallel Sysplex got started the number of members was very small. For reference, a z17 ME1 can have up to 85 LPARs, and aContinue reading “Two Of These Are Not Like The Others”
Bursty Batch
Bursty batch is quite common. For example, a customer I’m dealing with right now kicks off a burst of batch at 7PM and another burst at 10PM. I doubt that customer is reading this blog post. Another customer has a burst of batch kicking off at 2AM. They probably will read this post. But theirContinue reading “Bursty Batch”
Mainframe, Performance, Topics 