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What is virtual Memory under Linux?

  
Total Answers and Comments: 2 Last Update: January 03, 2007     Asked by: Raghavendra 
  
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March 28, 2006 02:09:02   #1  
Warrior        

RE: What is virtual Memory under Linux?
Virtual Memory in linux is possible using a swap filesystem rather than using a file for swapping puposes in windows
 
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January 03, 2007 12:23:12   #2  
Hitesh        

RE: What is virtual Memory under Linux?
Linux supports virtual memory that is using a disk as an extension of RAM so that the effective size of usable memory grows correspondingly. The kernel will write the contents of a currently unused block of memory to the hard disk so that the memory can be used for another purpose. When the original contents are needed again they are read back into memory. This is all made completely transparent to the user; programs running under Linux only see the larger amount of memory available and don't notice that parts of them reside on the disk from time to time. Of course reading and writing the hard disk is slower (on the order of a thousand times slower) than using real memory so the programs don't run as fast. The part of the hard disk that is used as virtual memory is called the swap space
 
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