Discourse server performance or load testing

Hi all,
I want to know the best way people are doing for load testing the discourse API server. I started using Jmeter and currently working on it. But still if there is a best approach or already existing mechanism will be a great help. Goal is to know how many concurrent users system can handle by consuming most used API’s . Also want to know At what will be the load will the bottlenecks happens like Database issues. Thanks in Advance.