Get the source code for this video for FREE → Want to master Clean Architecture? Go here: Want to unlock Modular Monoliths? Go here: 🚀 Did you know Postgres can be used as a cache? In this video, I’ll show you how to build a simple yet powerful caching service using just Postgres and SQL—no extra tools required. You'll learn how to: ✅ Store key-value pairs using JSONB ✅ Implement cache invalidation and eviction ✅ Use pg_cron for background cleanup jobs ✅ Leverage unlogged tables for performance ✅ Benchmark Postgres vs Redis using K6 ✅ Build a caching abstraction with a clean API We'll also compare performance with Redis, and I’ll walk you through the benchmarks, architecture, and implementation using .NET Aspire, Dapper, and Docker. 🔗 Get the full source code in the pinned comment below. Check out my courses: Read my Blog here: Join my weekly .NET newsletter: Chapters 0:00 What is a Caching Service? 2:28 UNLOGGED TABLE syntax 5:23 Caching endpoints SET, GET 9:26 Comparing with Redis 12:26 BONUS: Caching service