Checkpoints

As described above, checkpoints are taken at various times to provide a known consistent start point for recovery. The checkpoint process AMQALMPX is responsible for taking the checkpoint at the following points:

• Queue manager startup (STRMQM).

• Queue manager shutdown (ENDMQM).

• After a period of time has elapsed since the last checkpoint (the default period is 30 minutes) and a minimum number of log records have been written since the previous checkpoint (the default value is 100).

• After a number of log records have been written. The default value is 10 000.

• After the journal threshold size has been exceeded and a new journal receiver has been automatically created.

• When a full media image is taken with:

  RCDMQMIMG  OBJ(*ALL)  OBJTYPE(*ALL)  MQMNAME(<Q_MGR_NAME>)  DSPJRNDTA(*YES)