If the server is using NGINX, is there a need for pm2?

Question

Nginx

The NGINX config has a parameter worker_processesor something like that.

If I understand correctly, then this parameter sets the number of application instances, and it is best that it does not exceed the number of cores.

For NodeJS applications, there is also a load balancer / classifier, with which you can also use all the processor cores.

If the server uses NGINX, is there any point in using PM2 at all? Or am I misunderstanding how NGINX works?

Answer 1

1. worker_processes is about the number of nginx workers (instances)
   
2. PM2 is about the number of nodejs instances (in the context of the question)
   
3. nginx and nodejs each live their own lives and are only connected via tcp or unix-socket
   

so yes it makes sense