What is virtual memory?
Virtual memory is a common part of most operating systems on desktop computers. It has become so common because it provides a big benefit for users at a very low cost.
Otherwise ,"Virtual memory" refers to the use of hard disk space as if it were RAM (physical memory). As multitasking operating systems emerged, virtual memory became a necessity, especially on computers with lower amounts of physical memory.
Virtual memory is a common part of most operating systems on desktop computers. It has become so common because it provides a big benefit for users at a very low cost.
Otherwise ,"Virtual memory" refers to the use of hard disk space as if it were RAM (physical memory). As multitasking operating systems emerged, virtual memory became a necessity, especially on computers with lower amounts of physical memory.
Advantages
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Virtual memory's greatest advantage, along with the reason it was invented, is that it allows more data to remain in use at one time than the computer's physical memory is capable of holding. This data can also be broken up and reorganized to maintain efficiency when it is not in use. Its use is dependent on the amount of data in use at one time, so virtual memory files do not take up unnecessary space on the disk.
Disadvantages
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Virtual memory also has its drawbacks. Since the data is stored on the hard disk instead of in physical memory, the time it takes to access this data is slightly longer. As a result, the computer can be a bit slow when much virtual memory is in use. Additionally, when a lot of data is in use at one time, virtual memory files can grow somewhat large, leaving little free space for users with small hard disks.
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