How Can I Identify and Resolve Table Locks in SQL Server 2005?

Determining Table Locks in SQL Server 2005

When executing query batches, it's essential to identify which database locks are applied to which rows. This knowledge can assist in optimizing database performance and resolving potential deadlocks.

Tools for Real-Time Row Level Locking Monitoring

While there may not be specific tools dedicated to real-time row level locking highlights, you can leverage various techniques to gain valuable insights.

Using sys.sysprocesses to Identify Blocked Statements

One approach is to utilize the sys.sysprocesses system table. By querying this table for statements with a blocked value greater than 0, you can identify which statements are experiencing a block.

select cmd,* from sys.sysprocesses
where blocked > 0

This query will also provide information on what each block is waiting on, allowing you to trace the dependency chain leading to the initial block.

Additional Comment by MikeBlandford

MikeBlandford adds that the blocked column discloses the spid of the blocking process. You can resolve the blocking by executing the following command:

kill {spid}

By implementing these techniques, you can gain a better understanding of table locks and improve the performance and stability of your SQL Server database.

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