[electerious]

> What happens when you start to accumulate over 5 million+ records

I don't think Ackee is the right tool if your site as so many visitors. And to be honest: I don't know what will happen at this scale. There shouldn't be a problem as long as MongoDB can handle it.

[nodesocket]

Agree, just make sure you are running a modern version of MongoDB with WiredTiger storage engine and the server has enough memory. It should be able to handle 5 million records on modest hardware.