Documentation required for diagnosing performance problems
The following documentation is required for diagnosing JES3 address
space performance problems:
- JES3 Job Monitor Facility (JMF) output during problem and non-problem
periods
It is recommended that JMF be run periodically to establish a baseline of normal performance. This is especially important following system modifications. This baseline can then be used as comparison reference point in respect to current performance.
- Dump/s created during the problem period
- JES3 initialization stream
- RMF™ (Remote Measurement Facility) reports if problem isn't centralized to JES3
- DEV (Device Activity Report) to diagnose slow spool I/O response time.