Chapter I: Networking & Web Fundamentals
Cache Eviction Policies
LRU, LFU, and FIFO — deciding what to remove when the cache is full.
In short
When a cache is full, an eviction policy decides which entry to remove to make room.
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Key takeaways
- LRU evicts the coldest entry; LFU evicts the least popular.
- Combine eviction with TTLs to bound staleness.