如果您在没有空闲cpu时或者在操作系统需要交换虚拟内存的地方试图优化服务器，则无法使其变得很快。
If you try to tune a server when there is no free CPU or where the operating system is swapping virtual memory, you won't get very far.
这种分页算法可以确定对当前位于RAM中的哪些虚拟内存页面的页帧进行回收，并放回到空闲列表中。
This paging algorithm determines which virtual memory pages currently in ram ultimately have their page frames brought back to the free list.
它显示系统中真实内存和虚拟内存的使用量和空闲量。
It shows the used and free sizes of real and virtual memory in the system.
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