Covers caching correctly — deciding what is worth caching, choosing between cache-aside, write-through, and write-behind, setting TTLs from real staleness tolerance, invalidating on write instead of hoping a TTL catches it, and preventing thundering-herd stampedes on expiry. Use this whenever the us
Covers caching correctly — deciding what is worth caching, choosing between cache-aside, write-through, and write-behind, setting TTLs from real staleness tolerance, invalidating on write instead of hoping a TTL catches it, and preventing thundering-herd stampedes on expiry. Use this whenever the user adds a cache layer, picks a TTL, debugs stale reads, sees a load spike on the database right afte