当内存缓冲区被锁定后，将不能从物理内存进行分页。
When memory is locked, it cannot be paged out of physical memory.
因此，逻辑内存必须由池中的物理内存和Paging VIOS上的分页设备共同支持。
Therefore, logical memory has to be backed by both the physical memory in the pool and by the paging devices on the paging VIOS.
当空闲的物理内存较少时，可以将最近没有使用过的程序从RAM转移到分页空间，以帮助释放物理内存，从而完成更多的实际工作。
When free physical memory starts getting low, programs that have not used recently are moved from ram to paging space to help release physical memory for more real work.
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