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This wait type exists so that all lock modes have _LOW_PRIORITY and _ABORT_BLOCKERS wait types, but this wait type is not used.

The only _LOW_PRIORITY and _ABORT_BLOCKERS wait types that are used, during online index and partition switching operations, are:

(Books Online description: “Occurs when a task is waiting to acquire an Exclusive lock with Abort Blockers on the current key value, and an Exclusive Range lock with Abort Blockers between the current and previous key. (Related to the low priority wait option of ALTER TABLE and ALTER INDEX.)”)

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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 974 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.

Other information:

This wait type is not used.