Poor database Performance is a thorn in every DBA’s side. And it isn’t always easy to isolate the root cause of performance issues, which only adds to the stress. 

Tuning your Sql Server databases is a great way to resolve some of your performance issues, but it may not always be obvious where you should start the optimization process. If you rule out disk space, memory, and other network and hardware performance killers, and your SQL Server performance is still lagging, it’s time to dig into your queries.