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(Books Online description: “Occurs during synchronization between producer and consumer parts of batch execution that are submitted through the connection context.”)
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Added in SQL Server version:
Removed in SQL Server version:
Extended Events wait_type value:
Maps to the TWO_THREAD_PIPE_EVENT 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 294 in 2008 and 2008 R2, 337 in 2012, and 353 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):