Executing the Delete Statistics command discards all the replication statistics stored for the selected subscription or for the selected group of subscriptions. Subscriptions or groups of subscriptions that have no statistics appear with a status of None, indicating they have not yet been run, the statistics have been pruned automatically, or they have already been cleared from executing the Delete Statistics command.
If you select a subscription from the Subscriptions folder and execute the Delete Statistics command, all of the statistics for that subscription--regardless of whether the subscription was run individually or as a member of a group--are deleted from the log.
If you select a group and execute the Delete Statistics command, only the statistics that are related to running each member as part of that group are deleted. Statistics for running the subscription as part of another group or for running it as an individual subscription remain in the log.
The Data Replicator also may delete statistics for a subscription according to how the History Logging is configured for the service.