This value specifies the maximum size in megabytes (MB) of the XML cache for storing reporting information. The default value is 20 MB. The size applies to the cache in memory. When the limit is reached, the log file will "roll over". When a new record is to be added (bottom of the list), one or more of the oldest records (top of the list) will be deleted to make room. A warning will be logged to the Client log and the event log the first time this occurs, and will not be logged again until after the cache has been successfully cleared on transmission and the log has filled up again.