Overview of AIX Page Replacement

The AIX virtual memory manager (AIX VMM) is a page-based virtual memory manager. A page is a fixed-size block of data. A page might be resident in memory (that is, mapped into a location in physical memory), or a page might be resident on a disk (that is, paged out of physical memory into paging space or a file system). One unique aspect of the AIX VMM is the management of cached file data. The AIX VMM integrates cached file data with the management of other types of virtual memory (for example, process data, process stack, and so forth). It caches the file data as pages, just like virtual memory for processes.