Best way to find SQL Locks in SQL Server 2008

Question

What is the best way to find the SQL locks along wih the user associated with that lock in SQL Server 2008?

Answer 1

select * from sys.dm_tran_locks will list all current locks, granted or pending, along with the requesting session id. select * from sys.dm_exec_sessions will list all current sessions, including the client host and login name. But going this way is very seldom what you want. For a more digestible form, use the Activity Monitor and watch the blocking as reported there.

Answer 2

Run this against the master db:

SELECT spid,blocked,program_name,loginame,hostname,lastwaittype,* 
FROM master.dbo.SysProcesses
WHERE blocked <> 0