Specifically on Heroku, the different tiers of redis provide limits for the number of connections to it that can be made. This means that if you hav 5x100 low-m

Specifically on Heroku, the different tiers of redis provide limits for the number of connections to it that can be made. This means that if you hav 5x100 low-memory, low-cpu workers (arbitrary), you'll probably be playing $750/month just to have a redis instance that supports 5,000 connections. It has less to do with technical limitations and more to do with pricing of other services, I think. https://elements.heroku.com/addons/heroku-redis https://elements.heroku.com/addons/heroku-redis