Effect of message persistence

Persistent messages are logged. Logging messages reduces the performance of your application, so you should use persistent messages for essential data only. If the data in a message can be discarded if the queue manager stops or fails, use a nonpersistent message.

Data for persistent messages is written to log buffers. These buffers are written to the log data sets when:

• A commit occurs

• A message is got or put out of syncpoint

• WRTHRSH buffers are filled

If an application processes many messages in one unit of work this causes less input/output than if the messages were processed one for each unit of work, or out of syncpoint.