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Operating Systems: Virtualization, Concurrency & Persistence

Other VM Policies

Explore various virtual memory policies including when to load pages with demand paging or prefetching, and how clustering groups writes to improve disk efficiency. Understand how these policies impact system performance and memory management.

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Page selection policy

Page replacement is not the only policy the VM subsystem employs (though it may be the most important). For example, the OS also has to decide when to bring a page into memory. This policy, sometimes called the page selection policy (as it was called by Denning“Virtual Memory” by Peter J. Denning. Computing Surveys, Vol. 2, No. 3, September 1970. Denning’s early and famous survey on virtual memory systems.), presents the OS with some different ...