I have built an ASP application and I am now thinking about performance testing. I have looked at some of the web stress tools and they seem to be more focused on the server's performance and do not provide simple feedback.

I really want to know how many concurrent users my application will support based on the server on which it is sitting.

I realise there are a huge number of variables when looking at performance but surly there is a relatively simple method of bench marking.

Has anyone had any major performance issues with ASP and SQL Server?

Also how do others test the scalability of their work?

Thanks

Steve