Starting in Strategy 9.x, additional logging is available for Distribution Services. The "Summary" dispatcher is useful when troubleshooting the job(s) that is/are created for a Distribution Services subscription. The dispatcher can be found in the Strategy Diagnostics and Performance Logging tool as shown below.

Note: This trace is not enabled by default. An existing or new "File Log" destination must be selected for this logging to be used.
When a schedule triggers the execution of one or more subscriptions, a job is created for Distribution Services. This dispatcher will log details about a scheduled event.
When a scheduler triggers a subscription event, a sample of entries logged by the trace are shown below:
2013-12-18 17:44:00.236-05:00 RETRIEVE 6 subscriptions in total for scheduler 'All the Time', execute 6 subscriptions on this node. <Scheduler Execution ID = F9BCAA734593813DC061C49AA5CA0A16>
This dispatcher provides detailed information about the scheduler's name, how many subscriptions were retrieved and executed by the scheduler, and the Scheduler Execution ID.
Note: The "Summary" dispatcher will not log an entry if the subscription was not successfuly delivered due to an invalid physical address or report execution failure.