#Algorithms

Articles about Algorithms — exploring patterns, best practices, and real-world implementations in production systems.

1 post tagged with algorithms. ← All posts

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Pratik Dhanave · ·8 min read

Eviction Policies

A cache is a small space pretending to be a big one, and the pretense only works if it's clever about what to keep. When a bounded cache fills up, every new item forces out an old one — and which one you evict determines your hit rate, which determines whether the cache is worth having at all. Eviction policies are the algorithms that make this choice, and understanding them (especially the workhorse, LRU) is essential to building caches that actually stay effective.

A cache is a small space pretending to be a big one, and the pretense only works if it's clever about what to keep. When a bounded cache fills up, every new item forces out an old one — and which one you evict determines your hit rate. Eviction policies are the algorithms that make this choice.

#Caching#Performance#Algorithms#Backend Engineering

All posts on this site are written by Pratik Dhanave, an Agentic AI Architect with 7+ years building production distributed systems, multi-agent AI platforms, and cloud-native infrastructure. About the author → Each article includes working code, architecture diagrams, and references to the specific frameworks and standards discussed. Browse all posts or explore related topics using the tag cloud above.