Performance (PERFM) procedure

If your problem concerns performance, perform the following steps:

1. Check that all the parameters have been set as described in the section about how tuning the controller and tracker of Customization and Tuning.
2. Document the actual performance, the expected performance, and the source of information for the expected performance. If a document is the source, note the order number and page number of the document.
3. Document the information about your operating environment, such as:
   • The number of active initiators, number of TSO users, and number of HCL Workload Automation for Z users connected.
   • Other licensed programs that are active in your environment.
   • Any user modifications to the program. Exits, REXX programs, and command lists can affect performance. You should consider whether the user-installed code, REXX programs, or CLISTs are contributing to the problem.
4. If you are using the end-to-end feature, document the network topology.
5. Document any modifications to your system. Performance problems can be related to various system limitations. Your market division representative might be able to identify possible causes of a performance problem.
6. Compile the required documentation described in Information needed for all problems.
7. Obtain a dump, using the z/OS® DUMP command.