Moving Beyond Disk: How Redis Supercharges Your App Performance

The article explains how Redis, an in-memory data store, dramatically improved application performance by caching frequently accessed data that was previously queried from PostgreSQL, reducing response times from 200ms to under 10ms. It details the Cache-Aside pattern for reading data, Write-Through strategy for cache invalidation, and techniques like Jitter and Atomic Locking to prevent the Thundering Herd problem where mass cache expiration can crash the database.