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 for Prepaging
From The Free On-line Dictionary of Computing (30 December 2018) :

  working set model
      (Or "working set model") A technique whereby
     the operating system in a paging virtual memory
     multitasking environment loads all pages of a process's
     working set into memory before the process is restarted.
     Under demand paging a process accesses its working set by
     page faults every time it is restarted.  Under prepaging the
     system remembers the pages in each process's working set and
     loads them into physical memory before restarting the process.
     Prepaging reduces the page fault rate of reloaded processes
     and hence generally improves CPU efficiency.
     ["Modern Operating Systems", Andrew S. Tanenbaum,
     pub. Prentice Hall, Inc.  1992].

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