What can be used to monitor the code / response time of a loaded service?

Question

Nginx

There is a loaded REST service on the spring framework + nginx. It is necessary to visually monitor the number of HTTP requests incoming to it, the average response time of the service with an accuracy of 10 ms, and display in real time on the chart the number of responses with a specific code 200/500 + the number of requests that took more than 100 ms to complete.
What tools can be used to accomplish this?

Answer 1

As an option:

1. haproxy (free)
   
2. zabbix (free, most likely you will have to write your own scripts for this monitoring)
   
3. nginx plus (paid)
   

Answer 2

https://www.datadoghq.com/