memchache的问题。
- 缓存命中(HIT)，这个很好理解。
- 缓存没读到，返回FALSE。
- 那么什么是缓存MISS啊？我怎么不理解这个MISS是怎么来的？
回复内容：
- 缓存命中(HIT)，这个很好理解。
- 缓存没读到，返回FALSE。
- 那么什么是缓存MISS啊？我怎么不理解这个MISS是怎么来的？
但凡是get没有取到数据的都算MISS
可以大体看下memcached的源码，在处理get请求process_get_command时进行的miss/hit的统计，而miss执行的条件是在查找指定key不存在或已过期的情况下。
memcached终究还是个cache容器，对cache来说终归只有两种get状态HIT、MISS，这跟返回值是无关的。
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