Swap File


  • A swap file (or swap space or, in Windows NT, a pagefile) is a space on a hard disk used as the virtual memory extension of a computer’s real memory (RAM). Having a swap file allows your computer’s operating system to pretend that you have more RAM than you actually do. The least recently used files in RAM can be “swapped out” to your hard disk until they are needed later so that new files can be “swapped in” to RAM. In larger operating systems (such as IBM’s OS/390), the units that are moved are called pages and the swapping is called paging.


  1. TechTarget, swap file (swap space or pageful) definition, http://searchwindowsserver.techtarget.com/definition/swap-file-swap-space-or-pagefile
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