How to check the site under load?

Question

Highload

I published an updated site, and it began to create an unusually high load on the hoster's CPU with relatively little traffic. As a result, I had to roll back to the previous version of the site. How to avoid this situation and predict the load on the CPU?

Answer 1

If your attendance is low and the load is high, then you need to check not under load, but simply with a profiler, because your code is not optimal.
You didn't specify the technology stack, so I'll write for php - xhprof .
Well, in general, there are several tools for conducting load testing:
- Yandex.Tank
- Siege
- Apache ab