SQL Server 2017 Query Performance Tuning: Troubleshoot and Optimize Query Performance

© Grant Fritchey 2018

Grant FritcheySQL Server 2017 Query Performance Tuninghttps://doi.org/10.1007/978-1-4842-3888-2_26

26. Database Performance Testing

Grant Fritchey¹ 

(1)

Grafton, Massachusetts, USA

 

Knowing how to identify performance issues and knowing how to fix them are great skills to have. The problem, though, is that you need to be able to demonstrate that the improvements you make are real improvements. While you can, and should, capture the performance metrics before and after you tune a query or add an index, the best way to be sure you’re looking at measurable improvement is to put the changes you make to work. Testing means more than simply running a query a few times and then putting it into your production system with your fingers ...