Why Use the Query System Information Service

The Query System Information service, IWMWSYSQ, returns a list of systems running in goal mode and information related to available CPU capacity and resource constraints. Applications that schedule work across multiple systems in an MVS™ sysplex can use this service to:

• Locate the “best” (fastest or most idle) system in a sysplex for scheduling specific work
• Avoid scheduling additional work to systems already critically overloaded
• Factor workload management business importance level information into scheduling decisions.

The output of this service is a data area mapped by the IWMWSYSI macro, that provides a point-in-time snapshot of each system workload management is managing in the sysplex. A scheduling application can interpret and use this information to schedule one or more types of work to systems with specific operating characteristics.

Refer to IWMWSYSQ – Querying System Information for more information about this service.