New Relic\AppDynamics\... Is there an open source equivalent for your server?

Question

Highload

There is a highly loaded backend - a kind of API in PHP.
I would like to control the average server response time for various API requests and receive monitoring with graphs.
According to the description of "New Relic" and "AppDynamics" it is very similar, we are looking for a version on our server.
Ps You can write your bike of course, but I really don’t want to.

Answer 1

Munin. Did you expect a different answer?

Answer 2

nagios