Performance keyword

The performance keyword can be used to search the IBM® documentation and software support database for known problems and solutions.

We can resolve most performance problems through system tuning, which should be handled by the IBM MQ for z/OS® system administrator. Before following the procedure show in this topic, use this checklist to verify that the performance problem cannot be resolved through other means:

See Dealing with performance problems on z/OS to determine if we can change the way we have designed your IBM MQ for z/OS subsystem and applications to improve their performance.
Verify that the performance problem is not related to a WAIT or LOOP. See Dealing with applications that are running slowly or have stopped on z/OS.
If the problem occurred immediately after you did something an IBM MQ manual told you to do, the problem might be related to the manual. See Documentation keyword.
If performance degraded after someone tuned IBM MQ for z/OS, verify that the tuning options selected were appropriate. Perhaps we can resolve the problem by choosing other options.

If we have verified that the performance problem cannot be resolved through other means, use the following procedure:

Record the actual performance, expected performance, and source of expected performance criteria.
Add PERFM to your keyword string, as shown in the following example, and see Searching the IBM database for similar problems, and solutions.
If required, we can narrow your search by adding free-format keywords that describe what you were doing when you experienced the performance problem.