Controlling CICS-WebSphere MQ bridge throughput

You can control the throughput of the bridge by putting the bridge program transaction, CKBP, in a class of its own and setting the CLASSMAXTASK to suit your requirements.

Request messages browsed by the bridge monitor CKBR are marked and hidden for a period of time specified as the Mark Browse Interval (MarkBint) to allow time for CKBP to get the message once it has been started by CKBR. If CKBP does not get the message within MarkBint it becomes available again for reprocessing. If CKBP is not getting messages from the queue for some reason, reprocessing continues indefinitely. This is the default action of the bridge in this circumstance.

You can change the default action by specifying the ROUTEMEM=Y parameter on the bridge start data. This parameter causes messages to be routed to the Dead Letter Queue (DLQ) when their mark expires and they become visible for reprocessing. For more information about the ROUTEMEM bridge start parameter, see Administering the CICS-WebSphere MQ bridge.