How to see SQL 2008 Locks and Blocked Tables

Question

During the ASP.NET execution of my app, it seems SQL 2008 Express holds some lock, and I get

Timeout expired.  The timeout period elapsed prior to completion of

the operation or the server is not responding

Maybe some of my query is not optimized. Visual Studio crashes with:

Microsoft Visual Studio may be unstable now. It is recommended that

you save all files and exit.

I need to see what query is blocking my tables, but I have the Express version. How can I do?

Thanks

Answer 1

You can query against the sys.dm_tran_locks dynamic view to obtain this information. Go here on MSDN to lean more.

Answer 2

exec sp_lock

and

exec sp_who2