The db2fopt command tells the optimizer to use the specified value for "buffer pool size," rather than adding up the pages of the buffer pools available.

db 2 fopt命令告诉优化器为“缓冲池大小(Buffer pool size)”使用指定的值，而非将可用缓冲池变量的页面加起来。

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If the pool size is not tuned correctly, many unused object instances can end up hanging around, using up memory without contributing value.

如果对象池大小没有正确调优，许多未使用的对象实例最终会被闲置，耗尽内存而不产生任何价值。

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ZFS implements variable block sizes for a variety of uses (commonly up to 128KB in size, but you can change this value).

ZFS 为各种不同的使用实现了可变块大小（通常大小达到 128KB，但是您可以变更此值）。

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China's huge size means that to maintain stellar growth rates, the economy needs to move up the value-added chain fast and grab more export market share.

WSJ: Diana Choyleva: China Is Too Large for Its Own Good