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高并发系统设计(2)——缓存命中率 #75

Open cyningsun opened 4 years ago

cyningsun commented 4 years ago

https://www.cyningsun.com/02-27-2020/high-concurrency-cache-miss.html

背景上一篇文章讲述了缓存的本质,使用快速的存储,承载尽可能多的请求,那么衡量缓存服务质量有两个标准:

平均访问延迟AAT(Average Access Time) = HitTime + (Miss Ratio * Miss Penalty) 缓存命中率 Cache Hit Ratio = [Cache Hits /