In the previous article, I have shared basic theory about the SQL Server Latches.

In this post, I am sharing T-SQL script to find different information and usage statistics of the SQL Server Latches.

Using sys.dm_db_index_operational_stats:

Using this dynamic management function, you can find information about the Locks and Latches.
You can pass different parameters like: DatabaseID, TableID, IndexID, and PartitionNumber.

/* Syntax: 
Sys.dm_db_index_operational_stats 
(
   Database identifier | DEFAULT | 0 | NULL
   ,Object identifier | DEFAULT | 0 | NULL
   ,Index identifier | DEFAULT | -1 | 0 | NULL
   ,Partition number | DEFAULT | 0 | NULL
)
*/


SELECT 
	OBJECT_NAME(object_id)
	,page_latch_wait_count
	,page_latch_wait_in_ms
	,tree_page_latch_wait_count
	,tree_page_latch_wait_in_ms  
	,Page_io_latch_wait_count
	,Page_io_latch_wait_in_ms
FROM sys.dm_db_index_operational_stats (DB_ID(), NULL, NULL, NULL)

Using sys.dm_os_latch_stats:

Using this dynamic management view, you can find different Latches counter information.

Using below DBCC, You can clear this view data for latest updated stats.

DBCC SQLPERF('sys.dm_os_latch_stats', CLEAR)

SELECT buffer related information.

SELECT * FROM sys.dm_os_latch_stats  WHERE latch_class = 'buffer'