出于性能的考虑，或者在诊断您怀疑可能与交换空间有关的问题时，您通常需要内存和分页使用情况的更加交互式的视图。
For performance reasons or when diagnosing a problem that you suspect might be swap space related, you often need a more interactive view of the memory and paging usage.
图5展示了这一简单报表的示例，这是一个输出到分页式报表的完整数据集。
Figure 5 shows an example of this simple report, which is the entire dataset printed out to a paged report.
提交的页只有在第一次被引用时才装入主存，因此成为请求式分页。
Committed pages are loaded into main memory only when the process first references them. Hence the name on-demand paging.
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