20547: CPU Critical: A modern revisit of a classic WLM option

Project and Program: Core Platform, Performance and Capacity Management

Tags: Proceedings, SHARE Orlando 2024, 2024

The CPU Critical attribute on the service class definitions has been around since almost the beginning of WLM but it is still sometimes misunderstood. What does it do? When should or shouldn’t you use it? What if it was enabled on all your importance 1 and/or 2 workloads? Join Scott Chapman and Peter Enrico in this session for an interesting exploration of the history and usage of CPU Critical, an examination of some modern uses of it, and finally some opinions about the upcoming z/OS 3.1 changes that may default CPU Critical on for certain importance levels (and already does during boost intervals). -- Presented by Peter Enrico; Scott Chapman

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