There isn't a hard and fast number that has been documented because it can vary with the type of workload, but as a rule of thumb, having more than 1 GB does not appear to be worthwhile.

但不存在一个确凿通用的数据，因为缓冲池的最佳大小随不同的负载类型变化，但根据经验，当缓冲池大于1GB时往往不是什么好事。

youdao

There isn't a hard and fast number that has been documented because it can vary with the type of workload, but as a rule of thumb, having more than 1 GB does not appear to be worthwhile.

但不存在一个确凿通用的数据，因为缓冲池的最佳大小随不同的负载类型变化，但根据经验，当缓冲池大于1GB时往往不是什么好事。

youdao