(Republishing, or using this info in a commercial product/website, is prohibited without permission. All other uses are permitted. If in doubt, please ask.)
This wait type occurs when event notifications have been configured and will occur once every time an event fires that has been configured for notifications.
(Books Online description: N/A)
Questions/comments on this wait type? Click here to send Paul an email, especially if you have any information to add to this topic.
Added in SQL Server version:
Removed in SQL Server version:
Extended Events wait_type value:
The map_key value in sys.dm_xe_map_values is 590 in 2008 and 2008 R2, 640 in 2012, and 656 in 2014 RTM. After 2014 RTM, you must check the DMV to get the latest value as some map_key values have changed in later builds.
Some events will cause more of these waits than others, as they fire more often. An example of one such event is AUDIT_SCHEMA_OBJECT_ACCESS_EVENT.
Known occurrences in SQL Server (list number matches call stack list):
Abbreviated call stacks (list number matches known occurrences list):