在图3中可以看到，物理内存总量是7808MB。
From Figure 3, you can see that the total physical memory is 7808mb.
一个虚拟内存系统的全部重点就是：你可以拥有一个虚拟的地址空间，它比计算机上的物理内存总量还要大。
The whole point of a virtual memory system is that you can have a virtual address space that's much bigger than the amount of physical memory on the computer.
因此，配置的逻辑内存总量可以大于池中的物理内存量。
So, the total logical configured memory can be greater than the physical memory in the pool.
该命令显示系统中的空闲内存、已使用的物理内存和交换内存的总量，以及内核所使用的缓冲区。
The command displays the total amount of free, used physical, and swap memory in the system, as well as the buffers used by the kernel.
该命令显示系统中的空闲内存、已使用的物理内存和交换内存的总量，以及内核所使用的缓冲区。
The command displays the total amount of free, used physical, and swap memory in the system, as well as the buffers used by the kernel.
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