Memory overview
This section gives an overview of memory as it relates to AIX 7. We discuss how AIX 7 uses
virtual memory to address more memory than is physically on your system. We also explain how the Virtual Memory Manager (VMM) actually works and how it services requests.
Any discussion of memory and AIX 7 must start with a description of the VMM. AIX newbies are sometimes surprised to hear that the VMM services all memory requests from the system, not just virtual memory. When RAM is accessed, the VMM needs to allocate space, even when there is plenty of physical memory left on the system. It implements a process of early allocation of paging space. Using this method, the
VMM plays a vital role in helping manage real memory, not just virtual memory.
Here is how it works.[...]
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