Why and when to perform this task
WebSphere for z/OS always collects certain performance data on z/OS which is available through the facilities of z/OS operating system which includes RMF data. Workload Management (WLM) delay monitoring is always enabled for WebSphere for z/OS. The Performance Monitoring Infrastructure (PMI) data is a non-platform specific WebSphere set of API's to do performance monitoring. The System Management facilities (SMF) interface is a z/OS platform way of collecting performance and accounting information. The PMI and SMF data are each individually configurable and need to be enabled. WebSphere for z/OS relies on its use of WLM services to collect some of the accounting and performance data. This information gets presented back to the installation through RMF and RMF-written SMF records. See Collecting job-related information with Systems Management Facility (SMF).
WebSphere Application Server collects data on run time and applications through the Performance Monitoring Infrastructure (PMI). Performance data can then be monitored and analyzed with a variety of tools.
To set up performance monitoring:
Steps for this task
The monitoring levels that determine which data counters are enabled can be set dynamically, without restarting the server. You can set these values in one of the following ways:
For WebSphere for z/OS, also refer to Collecting performance diagnosis information.
What to do next