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This wait type is when a thread is involved in a batch-mode sort around columnstore indexes.
(Books Online description: N/A)
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Added in SQL Server version:
Removed in SQL Server version:
Extended Events wait_type value:
Maps to the BATCH_MODE_SORT map_value in sys.dm_xe_map_values.
The map_key value in sys.dm_xe_map_values is 1062 in 2016 RTM. After 2016 RTM, you must check the DMV to get the latest value as some map_key values have changed in later builds.
In some situations on SQL Server 2016, a batch mode sort may be very inefficient and so trace flag 9358 was added that allows them to be disabled – see this KB article for details. Anecdotal evidence is that when this inefficiency happens, it can appear like a non-yielding scheduler.
Known occurrences in SQL Server (list number matches call stack list):
Abbreviated call stacks (list number matches known occurrences list):