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(Books Online description: N/A)
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Added in SQL Server version:
Azure SQL Database
Removed in SQL Server version:
Extended Events wait_type value:
The map_key value in sys.dm_xe_map_values is 956 (and the map_value is UCS_CLUSTER_PROXY_ROUTER) as of May 2018. You must check the DMV to get the latest value as some map_key values have changed in later builds.
(No call stacks for this wait type as call stack capturing is not possible with Azure SQL Database.)