In database administration programs, locks are used to regulate concurrent entry to knowledge. When a number of customers are accessing the identical knowledge on the identical time, locks stop one consumer from making adjustments that would corrupt the info being accessed by one other consumer. SQL Server offers various methods to test locks, together with the sys.dm_tran_locks dynamic administration operate (DMF) and the sp_lock system saved process.
Checking locks will be helpful for troubleshooting efficiency issues or deadlocks. For instance, if a question is taking a very long time to execute, you possibly can test the locks to see if one other session is obstructing it. Or, in case you’re experiencing deadlocks, you possibly can test the locks to see which classes are concerned within the impasse and what sources they’re ready for.