Foglight® restricts the number of instances of an object of any type to 10000. When this limit is reached, the event is logged and should be investigated. Either it is an exceptional situation or the limit has to be raised (per type, using the foglight.limit.instances registry variable).
The diagnostic snapshot is a text file contained in the Foglight® Management Server support bundle. It contains information that is very useful for diagnosing Management Server performance issues. Due to the fact that there is often a lot information in the snapshot, the information can be difficult to interpret.