A few time ago I had the opportunity to investigate about an unexpected SPID (Session Process ID) change. The inquiry began when a customer of ours starts to complain for locks, and lock time out error. These locks sometime were more frequent and sometimes not. To investigate about this issue, I have taken two SQL Profiler trace files ...

From Red-Gate website you can download (for free) the ebook Performance Tuning with SQL Server Dynamic Management Views written by Louis Davidson (@drsql) and Tim Ford (@sqlagentman). DMVs are objects that publish information about the health state of a SQL Server instance. They allow you to monitor the heart of the system to diagnose ...