Web server performance/test tool

Question

I'm looking for a tool that simply tests a web server which I developed an application on it.

Tool must tell me that entire web server or a page in my application
- can serve at most how many users
- can use how much CPU
- can measure transaction per second (TPS)

Please do not confuse my question for a kind of http(s) listening tools like Fiddler.I do not want to listen,I do want to test it (This is like "Can you run it" tool for a game)

Answer 1

ApacheBench (don't be fooled by the name) will load up your app and give you a count of how many requests per second you can deliver. In addition, it's concurrency options will give you an idea of usercount.

See also the Microsoft Web Capacity Analysis Tool.