When you get into hundreds of thousands of connections, this adds up to gigabytes of memory — memory that could be better used to store user data.

当达到几十万链接的时候，这些累计起来达好几个G——这些内存其实可以更好地用于存储用户数据。

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When this pool shrinks below 20 percent of total memory, memory ballooning is initiated.

当该池收缩到总内存 20%以下，内存膨胀就会启动。

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For efficiency, given the way that the hardware manages virtual memory, memory is managed in what are called pages (4kb in size for most architectures).

为了提高效率，如果由硬件管理虚拟内存，内存是按照所谓的内存页方式进行管理的(对于大部分体系结构来说都是4kb)。

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For efficiency, given the way that the hardware manages virtual memory, memory is managed in what are called pages (4kb in size for most architectures).

为了提高效率，如果由硬件管理虚拟内存，内存是按照所谓的内存页方式进行管理的(对于大部分体系结构来说都是4kb)。

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