Architecture Pony

Nov 3, 2026 · Backend Development

Caffeine Deep Tuning: W-TinyLFU, Hit-Rate Engineering & 62%→98.7% Case Study

This article explores Caffeine's W-TinyLFU eviction algorithm, five-step hit-rate engineering methodology, and a real-world Spring Boot case study that improved cache hit rate from 62% to 98.7% through capacity weighting, refresh-after-write, and hot-key isolation.