Page Replacement

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In this paper, the authors discuss about algorithms specific to paging. For outline of general cache algorithms (e.g. processor, disk, database and web), in a computer operating system that uses paging for virtual memory management, page replacement algorithms decide which memory pages to page out (swap out and write to disk) when a page of memory needs to be allocated. Paging happens when a page fault occurs and a free page cannot be used to satisfy the allocation, either because there are none, or because the number of free pages is lower than some threshold.

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