This setting determines the age threshold at which successful jobs can be purged when the Queue Cleanup job runs. The age ...

This setting determines the age threshold at which successful jobs can be purged when the Queue Cleanup job runs. The age of each job is determined by the completed date and time. E.g. If a job succeeded at 2/1/2007 10:41 p.m.  and the Queue Cleanup job runs at 2/2/2007 11:55 p.m., then the job will be purged (assuming the Cleanup Age Limit For Successful Jobs was 1 day).  Since the number of successful jobs  is usually high, the Cleanup Age Limit For Successful Jobs setting is usually set to a low value of 24 (1 day).