物理内存

• Physical memory zone
  物理内存区域
• Commitment assigns physical memory to the linear address range
  所谓提交（ commitment ）就是将物理内存分配到一个线性地址范围上。
• The total amount of physical memory in kbytes available to the operatingsystem
  对operatingsystem可用的物理内存总量（以kbytes为单位） 。
• Free physical memory , free virtual memory , free number of processors , and so forth
  。空闲物理内存，空闲虚拟内存、空闲处理器数量，等等。
• If it is , the operating system cannot use any physical memory above 16 gb
  参数。如果存在该参数，操作系统就不能使用超过16 gb的物理内存。
• Allocation of physical memory is deferred to the point where it is actually referenced
  而物理内存的分配则被延迟到实际引用时才会真正进行。
• To support more than 4 gb of physical memory on 32 - bit operating systems , you must add the
  若要使32位操作系统支持4 gb以上的物理内存，必须向
• This is the physical memory in bytes for which space has been reserved on the disk paging file
  保留给磁盘分页文件的物理内存空间（字节数） 。
• The range is not backed by physical memory until the memory is committed
  直到这段内存被提交时，才会将物理内存映射到这个范围的线性地址空间上。
• No man or woman is worth your tears , and the one who is , won ‘ t make you cry
  没有人值得你流泪，物理内存虚拟内存值得让你这么做的人不会让你哭泣。