How to know when a node server is going to start rejecting traffic due to server load/traffic load?

Hi allI have a number of small node servers running behind a load balancer. The job of each small node server is to accept the request, copy its payload, and put the payload into a queue. A HTTP 200 is then returned.Each of the node servers is a $5 digital ocean droplet.This is all working fine, but I am sort of guessing when I need to add more servers to handle the load.So let's say the amount of traffic received doubles.1) Is there an easy way to know if the servers are struggling and dropping / rejecting traffic?2) Is there a way to be notified when the servers are reaching a critical point (e.g. "if the traffic increases by 5% more I'm going to have to start rejecting requests").Thanks for your help.

Submitted October 19, 2018 at 06:41PM by stiofan_io