Every DBA knows that there are certain aspects of SQL Server and its associated hardware that you simply must monitor if you want to measure overall system performance. However, not everyone knows exactly what to monitor, how to monitor, and—most important—how to interpret the results. In this longer-than-usual edition of "PTO for the Rest of Us," I'll go into some depth to explore one of these crucial puzzle pieces: I'll use a built-in dynamic management view (DMV)...