The page fault frequency replacement algorithm

Dynamic memory management is an important advance in memory allocation especially in virtual memory and multiprogramming systems. In this paper we consider the case of paged memory systems: that is, the physical and logical address space of these systems is partitioned into equal size blocks of contiguous addresses. The paged memory system has been used by many computer systems. However, the basic memory management problem of deciding which pages should be kept in the main memory to allow efficient operation without wasting space is still not sufficiently understood and has been of considerable interest. Obviously, pages should only be removed from the main memory if there is a very low probability that they will be used in the near future. The difficulty lies in trying to determine which pages to remove, without incurring difficult implementation problems at the same time.