改进性能低下的 web 应用程序的方法之一是，通过增加服务器、带宽甚至数据中心来分担负载，从而扩展容量。
One approach to tackle an under performing web application is to expand capacity by adding more servers, bandwidth and perhaps even more data centers for offloading.
通过扩展虚拟容量，可以使用更多的底层RAM。
By extending the virtual capacity, more of the underlying RAM can by used.
缓冲池大小的指定要取决于可用存储(包括中央存储和扩展存储)的容量。
The designation of buffer pool sizes is dependent upon the amount of storage (both central and expanded) that is available.
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