在一定的负载压力下，如果缓存命中率太低了，就启用它。

For certain workloads cache hit ratio is lower than would justify having it enabled.

youdao

在一定的负载压力下，如果缓存命中率太低了，就启用它。

For certain workloads cache hit ratio is lower than would justify having it enabled.

youdao