Lesson Learned #22: How to identify blocking issues?

Today, we were working on a service request where our customer reported that, some TRUNCATE executions are taking more time that they expected. Normally, these TRUNCATE commands just only take 3 or 5 seconds to complete, however, this time, the problem is that they never finish. Using the following TSQL command: select conn.session_id as blockerSession,conn2.session_id as…