[QUESTION] Does redis get my server run out of memory

[nhokmoon]

My server has 8 GB of RAM, and I use Redis for caching. If my API, which uses Redis for caching, handles about 100 requests per second, will my server run out of RAM given that Redis caches data in memory?

[mgravell]

There isn't enough data to answer that. This is rhetorical - you don't need to answer, but:

• how many unique keys are there at any time, after accounting for the lifetime of your data?
• how large is each key+payload pair?

Multiplying those two numbers, plus some slack, should give you an idea of whether the size is sufficient. After that: eviction policy: https://redis.io/docs/latest/develop/reference/eviction/