Caching Strategies

Why Cache?

Without cache:  Client ─────────────────────── Database
                        100ms per request

With cache:     Client ── Cache (hit) ──────── 1-5ms
                        │
                        └── Cache (miss) ──── Database ── 100ms
                                                          (then cached)

Cache hit ratio target: 80-95%+

Caching Patterns