Excessive CICS I/Os, transaction CPU time
If your CICS® application or transaction, which is executing a map or systems of maps, seems to generate an excessive amount of EXCPS (I/Os) and your transaction itself is using an excessive amount of CPU time, there are a number of items you can immediately examine and correct if needed, to improve the total required EXCPS, and CPU time.
The following table lists recommendations to make better use of CPU resources required for a particular map execution, along with documentation that contains additional information:
- Recommended Action
- Documentation References
- Identify and verify LSR (Local Shared Resources) pools, strings and usage of CICS shared data tables, if applicable.
- See the IBM® CICS documentation.
- Use striped data sets if applicable and available.
- Striped Data Sets
- Calculate new WorkSpace PageSize size:count settings based upon your map(s) work.
- Execution Command Settings
- Examine the usage of the -WM (Work Files in Memory) option.
- Execution Command Settings
- Proceed with any possible map tuning, if applicable.
- Map Performance Tuning Tips