Activating and controlling the IMS Monitor

If you create a DFSDCMON member in the IMS.SDFSRESL data set, you do not need a DD statement in the IMS, DBC, or DCC procedures for the IMS Monitor because IMS dynamically allocates and deallocates the IMS Monitor data set. You start and stop the IMS Monitor with the /TRACE command.

Otherwise, to activate the IMS Monitor, you must include a DD statement (using IMSMON as the data set name) in the IMS, DBC, or DCC procedures to specify the IMS Monitor log data set. When you include this DD statement, the IMS Monitor becomes available. If the IMS Monitor is available but inactive, processor usage is unaffected.