If at all possible, the heap should never be sized so that the machine needs to use virtual memory to accommodate it.

如果这些都有可能，则不应该调整堆大小以便机器需要使用虚拟内存来容纳它。

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From here, you can determine that its objectives are to help minimize both the response time of page faults and to decrease the use of virtual memory where it can.

由此可以看出，它的目标是帮助最大限度地缩短缺页响应时间，并在可能的情况下减少虚拟内存的使用。

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The physical hardware might have a large amount of memory, but the hypervisor might designate only 1gb of that memory for a particular virtual system's use.

物理硬件可能拥有大量的内存，但是虚拟监管系统为特定虚拟机系统的使用只分配了1 GB的内存。

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The flaw, which affected the virtual machine monitor (VMM) in Virtual PC, could enable an attacker to use applications running in user-space on a guest OS to access portions of the Virtual PC memory that should be inaccessible to those applications.

FORBES: How Bad Assumptions Are Making Software Less Secure