Does Apache Benchmark allow intervals between each request?

I have a server which blocks burst request (if the same IP address accesses the server more than 3 times a second, it will serve 500 error).

So when I use Apache benchmark, I see a lot of failed requests, even when I set concurrency to 1.

Is there an option to set an interval between each request? Or is there similar benchmarking tools that offers this interval functionality?

Answer

You're really not going to accomplish any meaningful load testing with concurrency limited to 3. You probably need to remove the requests per second restriction for the IP that you're testing from.