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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 a NULL lock with Low Priority on the current key value, and an Insert Range lock with Low Priority between the current and previous key. A NULL lock on the key is an instant release lock. (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 947 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.
This wait type is not used.