Benchmark website

How can i benchmark a website ? i want to define how many user can i handle simultaneously. Can you suggest me any read / tool that helps ?

I don't thi开发者_开发百科nk that matters but the site is a Flex application that consumes some services provided by tomcat's servlet

Apache Bench 'ab'

ab is a tool for benchmarking your Apache Hypertext Transfer Protocol (HTTP) server. It is designed to give you an impression of how your current Apache installation performs. This especially shows you how many requests per second your Apache installation is capable of serving.

*I'm assuming you're running nix and have Apache installed... so....

For Example:

If you want to send quantity 100 total requests, 10 requests at a time, type this command at your command prompt:

# ab -n 100 -c 10 http://www.somewhere.com/

There are some website which offer a service like this. I know Load Impact one which is free if you want to simulate up to 50 users at a time.