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SLoW

SQLBenchBLT is an open-source SQL Server Transact-SQL script for identifying slow, blocked, blocking or waiting queries on busy SQL Server systems. SQLBenchBLT accesses the sys.dm_os_waiting_tasks database management view's [resource_description] column to identify sources of blocking / waits instead of querying sys.dm_tran_locks, which can be expensive & slow on systems with large volume of locking data, especially when under stress.