Reserve/limit Passenger threads per Application

Question

I have multiple Rails apps in the same server running with Nginx + Passenger. I use:

    passenger_max_pool_size 20;
    passenger_min_instances 20;

to fix the number of active passenger instance but, how I fix the number for each app independently? I would like to set for example:

• APP_A: 2 passenger instances
• APP_B: 18 passenger instances

Is that possible?

Answer 1

To answer my own question: It can only be done with Passenger Enterprise using MaxInstances

There is no clean solution for free version of Passenger