•
An OS feature that presents larger
memory to the application than physically available
4 Additional
memory space comes from disk storage
4 Space
used on the disk for virtual memory is called ‘swap space/swap file or page
file.
4 Inactive
memory pages are moved from physical memory to the swap file
4 Provides
efficient use of available physical memory
4 Data
access from swap file is slower – use of flash drives for swap space gives best
performance
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