Expert Advice

CICSplex_MQBusyTCBs_Critical  
Situation Description
Suggested Actions
Situation Description

Critical threshold exceeded for MQ busy TCB count

 

Suggested Actions

There are eight subtask TCBs available for MQM requests. If all TCBs are busy, transactions may have to wait for their message queuing requests to be processed. A high number of busy TCBs does not necessarily result in CICS performance problems. Note that it is not possible to modify the number of TCBs CICS uses for MQM connections.

 

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