As the system adds more pages into real memory, the number of empty locations in real memory that can contain pages decreases.
随着系统将更多的分页添加到实际内存中，实际内存中空闲位置(可以包含分页)的数目将会减少。
2
The number of non-computational pages is referred to as numperm: The vmstat –v command displays the numperm value for a system as a percentage of a system’s real memory.
Reorganize the operating system as a tiny microkernel that runs in kernel mode, along with some number of user processes that do the real work of the operating system.