Appliedz/OS33 min
Workload Manager (WLM)
How z/OS decides which work gets the processor, memory and I/O first: business goals, service classes, importance and classification rules, and how to tell from SDSF and RMF whether work is meeting its goals.
What you will be able to do
- Explain how WLM manages work to business goals instead of fixed priorities
- Read a service definition: workloads, service classes, periods, goals, importance and classification rules
- Interpret execution velocity, response-time goals and the performance index
- Diagnose common production problems caused by misclassified or misprioritised work
Lessons
- What WLM doesOne z/OS system runs online transactions, batch, databases and system tasks at the same time.
- Service classes, goals and classificationA service class pairs a goal with an importance. The goal can be a response time, an execution velocity or discretionary.
- WLM in productionWLM problems show up as slow transactions or late batch. SDSF shows each job's service class, RMF reports show whether classes meet their goals, and a few commands display and…
Track your progress and earn a certificate.
Free account, 18 quiz questions for this subject.