Eviction

Redis Eviction Policies

How Redis decides which keys to remove when memory is full, the available eviction policies, and how to choose the right one for your workload.

Cache Eviction Policies

Covers the algorithms caches use to decide what to remove when full, comparing LRU, LFU, FIFO, and TTL-based approaches and their tradeoffs.

How Would You Design an LRU Cache?

An LRU (Least Recently Used) cache is designed by combining a hash map for O(1) key lookup with a doubly linked list that keeps items ordered by recency, so th…