Your DB Is Still Red After Adding a Cache — Here's Why

Short summary

Cache hit rate emerges from working-set size vs memory and access skew, not configuration. Write policies differ in failure modes: cache-aside and write-through safely bypass on failure, but write-behind shields the DB from writes until cache fails. Use Paperstack to simulate your architecture and watch the bottleneck move when you scale.

• •Cache hit rate emerges from working-set vs memory, not configuration
• •Write-behind shields DB from writes until cache fails—risky if DB isn't sized for it
• •Simulate your architecture to watch bottlenecks move, not from static diagrams alone

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