It is constant - but iirc, it'd be trivial to make a dynamically scaling pool. At the end of the day, a pusher is just a TCP connection. Keeping a pool of fixed

It is constant - but iirc, it'd be trivial to make a dynamically scaling pool. At the end of the day, a pusher is just a TCP connection. Keeping a pool of fixed size and planning capacity around scaling horizontally is a perfectly acceptable approach - given you know the potential throughput for each pusher.