From MySQL’s retired query cache to modern Redis/Memcached, this deep dive compares DB-level vs app-level query caching with real-world hit/stale rates and practical guidance.

By Codemia • Oct 4, 2025

5 min read

Follow Linux writeback’s evolution—from bdflush/pdflush to per-BDI flusher threads—and see how FS-Cache/CacheFiles on Ceph clients cut tail write latency by ~2×.

By Codemia • Sep 30, 2025

12 min read

We dig through five generations of garbage collectors—from CMS to ZGC—using flame graphs, then pit modern JVM ZGC, Go 1.23, and a Rust async executor on the same Kafka-style workload to hunt lingering GC-driven latency spikes. See which runtime tames the tail.

By Codemia • Sep 13, 2025

8 min read

How CXL 3.0 replaces DMA-based zero copy with cache-coherent memory pooling for in-memory databases, featuring an experimental Redis fork that maps remote DRAM under 200 ns.

By Codemia • Sep 10, 2025

5 min read