Describe the management scheme of the virtual memory manager.How does the VM manager improve performance?
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Answer:The VM Manager uses a page based management scheme. Pages of data allocated to a process that are not in physical memory are stored in either paging files on disk or mapped to a regular file on a local or remote file system.To improve performance of this scheme,a
privileged process is allowed to lock selected pages in physical memory preventing those pages from being paged out.Furthermore,since when a page is used,adjacent pages will likely be used in the near future,adjacent pages are prefetched to reduce the total number of page faults.