Performance considerations

The Identification keywords run a query against the HCL Workload Automation for Z current plan, and extract key information for every operation that matches. The Filter keywords filter down this information before taking action. The more precise you are in the Identification keywords, the faster the process will complete. Therefore, consider how many matches you might expect to find on the current plan at any one time using the Identification keywords when considering the estimated duration of the command.

Note: If you use COUNT(0), these commands can produce many updates to the current plan, across many different occurrences. The command automatically performs a PIF EXECUTE MCPBLK command after every change of occurrence, to ensure that no more than 255 operations are modified in a single transaction.