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(Books Online description: “Occurs on the versioning state change of an Always On secondary database. This wait is for internal data structures and is usually is very short with no direct effect on data access.”)
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Added in SQL Server version:
Removed in SQL Server version:
Extended Events wait_type value:
Maps to the HADR_VERSIONING_STATE map_value in sys.dm_xe_map_values (thanks to Jonathan’s post here).
The map_key value in sys.dm_xe_map_values is 868 in 2012 and 887 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.
Known occurrences in SQL Server (list number matches call stack list):
Abbreviated call stacks (list number matches known occurrences list):