Queue overflow protection for primary message queue structure (shared-queues environment)

In a shared-queues environment, you can implement two methods (SQTHRESHOLD and PSTHRESHOLD) for preventing queue overflow of primary message queue structure.

With queue overflow protection defined by SQTHRESHOLD settings, you can define a threshold for triggering action STOP. Queue overflow protection defined by PSTHRESHOLD settings allows you to define up to 10 thresholds for triggering action WTO.

To implement queue overflow protection with SQTHRESHOLD settings, you must define a threshold and action (STOP) as parameters of a SQTHRESHOLD statement in the IMS Queue Control Facility extension PROCLIB member.

To implement queue overflow protection with PSTHRESHOLD settings, you must define thresholds and action (WTO) as parameters of PSTHRESHOLD statements in the CQS monitoring server configuration PROCLIB member. With PSTHRESHOLD settings, you can also configure automatic unload of committed messages, which regains queue space by removing messages from the queue and relocating them.