I have an Asp.net website using SQL Server. I want to make a website overload test like http://loadimpact.com/ How can perform this test by myself and see my website performance?
I want to see max users, instant traffic, error pages etc.
You can do performance/stress testing with Visual Studio 2010 Ultimate and Visual Studio Test Professional 2010 which include a new application called Microsoft Test Manager to help you define and manage your testing effort by using test plans.
A good start would be by creating a LoadTestPlugin to do what you want at various points in the load test.