然后它仅仅提交一部分内存，这也是内存管理程序需要在实际内存和分页文件中分配页来支持它们的那一部分。
It then commits just a part of the memory, and it is only for this part that the memory manager needs to allocate pages in real memory and in the paging file to back them up.
很显然，在可以使用物理内存的情况下，管理员更希望使用物理内存，而不是分页空间。
Obviously, administrators prefer to use physical memory rather than paging space, where the physical memory is available.
当在多个LPAR之间动态地管理内存时，Hypervisor必须使用分页设备存储共享内存池的物理内存不能储存的过剩内存。
As memory is dynamically managed among multiple LPARs, the Hypervisor has to use a paging device to back up the excess memory that it cannot back up using physical memory from the Shared memory pool.
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