Use the performance keyword only when tuning cannot improve system
performance and performance is below explicitly stated expectations.
Record actual performance, expected performance, and the source
of the expected performance criteria. Include the order number and
page of the source document. If you contact the IBM® Support Center, you will be asked for this information.
Specify the performance keyword as PERFM.
If the problem is related to a function or module, specify the
function or module name as a modifier keyword.
Example:
If the module is IFG0194A and the function is OPEN, specify the keywords
as follows:
IFG0194A OPEN
If possible, isolate the probable source of degraded performance
to a specific DFSMSdfp subcomponent.