IMS™ multiple address space (MASS) support allows you to measure an IMS transaction that is eligible to run in multiple MPP regions, either within a single IMS subsystem or within an IMSPlex. You specify the IMS transaction and the IMS subsystem or IMSPlex group name to measure. Application Performance Analyzer determines the MPP regions that are eligible to process the transaction and returns a list of active MPP regions in Panel 4. You select the regions you want to measure. Application Performance Analyzer creates a parent observation for each IMS subsystem and one child observation request for each selected MPP region grouped within the IMS subsystem.
The NEW line command can be entered on any of the child observations or the IMS parent. When the NEW command is entered on a child observation, the new request is considered a single region request with a transaction code specification, and is initialized with the same parameter values as the original request. When the NEW line command is entered on the IMS parent of a single IMS subsystem, the new request is considered an IMS MASS request and is initialized with the same parameter values as the original request for a single IMS subsystem. The Panel 4 Active Jobs list is populated with the eligible MPP regions at the time of the new request and the desired regions must selected from the list.