The Heroku Redis Maxmemory Policy
Heroku offers a powerful Redis addon that comes with 25MB of free memory storage. But what happens when you exceed this limit? Heroku has a configuration option called maxmemory-policy that determines how the system handles the situation. By default, the maxmemory-policy is set to noeviction, which means that if you try to store more data than the available memory, Redis will raise an error. This is done to notify you of the issue and prompt you to take action....