Stop Blaming Cache Invalidation: The Architecture Decisions That Actually Break Your Performance
For decades, engineers have invoked the complexity of cache invalidation as a near-mystical explanation for performance failures and architectural shortcuts. But the real problem is rarely invalidation — it is the absence of a coherent caching strategy in the first place. This piece challenges the industry's most comfortable excuse and offers a more rigorous framework for cache placement, expiration logic, and knowing when to skip caching entirely.