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(Books Online description: “Used to synchronize the access to a cache of pages with available space for heaps and binary large objects (BLOBs). Contention on latches of this class can occur when multiple connections try to insert rows into a heap or BLOB at the same time. You can reduce this contention by partitioning the object. Each partition has its own latch. Partitioning will distribute the inserts across multiple latches.”)
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Added in SQL Server version:
Removed in SQL Server version:
Extended Events latch_class value:
Maps to the FSC map_value in sys.dm_xe_map_values.
The map_key value in sys.dm_xe_map_values is 4 in 2008 and 2008 R2.
Known occurrences in SQL Server (list number matches call stack list):
Abbreviated call stacks (list number matches known occurrences list):