What happens when the code for your Entity Framework LINQ queries looks good, but your app is very slow? Are you looking for the right place? Don't be afraid to start looking at your database. Knowing how to investigate and debug what your LINQ queries are doing in SQL Server is as important as the actual LINQ query in your .NET solutions. We will look at database server configurations, using MSSQL database profiling tools and understanding Query Execution Plans to get the most out of Entity Framework. In the end, learning to be an Entity Framework detective will make your project sound and snappy.