Message manager data records
Use this topic as a reference to the format of the message manager accounting records.
The message manager is the component of IBM MQ that processes all API requests. The format of the message manager accounting records is described in assembler macro thlqual.SCSQMACS(CSQDQMAC).
The QMAC data gives you information about the processor time spent processing IBM MQ calls, and counts of the number of MQPUT and MQGET requests for messages of different sizes.
Note: A single IMS application might write two SMF records. In this case, add the figures from both records to provide the correct totals for the IMS application.Records containing zero processor time
Records are sometimes produced that contain zero processor time in the QMACCPUT field. These records occur when long running tasks identified to IBM MQ either terminate or are prompted to output accounting records by accounting trace being stopped. Such tasks exist in the CICS adapter and in the channel initiator (for distributed queuing). The number of these tasks with zero processor time depends upon how much activity there has been in the system:- For the CICS adapter, this can result in up to nine records with zero processor time.
- For the channel initiator, the number of records with zero processor time can be up to the sum of Adapters + Dispatchers + 6, as defined in the queue manager attributes.
These records reflect the amount of work done under the task, and can be ignored. Parent topic: Interpreting IBM MQ for z/OS accounting data