Advanced Topics › Performance Considerations

Performance Considerations

If you are experiencing ENQ delays or bottlenecks on your system, follow these steps:

1. Examine ENQ/RESERVE activity.
2. Verify that you are not converting hardware reserves to global ENQs or propagating system or systems ENQs against the QNAME recommendations of the vendor. Use the display F MIMGR,DISPLAY COUNTS command to examine ENQ/RESERVE activity. Do not propagate ENQs for non-shared resources.
3. Refine the QNAME List.

   For customers running with GDIINIT PROCESS=SELECT, delete QNAMEs that should not be managed from the QNAME list, rather than coding GDIF=NO. Do not code EXEMPT=YES if there are no entries in the EXEMPT list that apply. Also code TRACE=NONE for all QNAMEs, unless there is a specific need to do tracing.

4. Refine the EXEMPT List.

   If you are running with DEFAULT RESOURCE=GLOBAL JOB=GLOBAL, remove any unnecessary GLOBAL statements, which increase search time. Similarly, with either RESOURCE=LOCAL OR JOB=LOCAL, remove any unnecessary LOCAL statements.

5. Dispatch priority and performance of the CA MIM address space

   Note: For detailed information on the CA MIM dispatching priority, control file tuning, and performance tips, see the chapter “Advanced Topics” in the CA MIM Programming Guide.