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METADATA_LAZYCACHE_RWLOCK

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Description:

Replaced by the MD_LAZYCACHE_RWLOCK in 2012. See that page for all information.

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Added in SQL Server version:

2008

Removed in SQL Server version:

2012

Extended Events wait_type value:

The map_key value in sys.dm_xe_map_values is 592 in 2008 and 2008 R2.