intermediate · datastores
Is 90% a Good Hit Rate?
Your cache hit rate is 90%. Is that good?
Practical scenario
A dashboard shows a steady 90% hit rate on the product cache. Someone proposes it as evidence that caching is working well and the team should move on.
What it tests
- • Whether the candidate refuses a context-free number
- • Understanding that miss cost matters more than miss count
- • Awareness of what a hit rate cannot tell you