What's the difference between "virtual memory" and "swap space"?

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Aryan Kumar · Answer

Virtual memory and swap space are both terms used to describe how operating systems manage memory in a computer. However, they have different meanings and implications.

Virtual memory is a technique that allows a computer to use more memory than is physically available. This is done by dividing the memory into pages, and then storing the pages in different locations, such as RAM and disk space. The operating system keeps track of which pages are in memory and which pages are on disk. When a program needs to access a page that is not in memory, the operating system will swap the page in from disk.

Swap space is a portion of a computer's disk space that is used to store pages that are not currently in memory. Swap space is typically used when the amount of physical memory is not enough to hold all of the pages that are currently being used by the computer.

The main difference between virtual memory and swap space is that virtual memory is a technique for managing memory, while swap space is a physical location where pages can be stored. Virtual memory allows a computer to use more memory than is physically available, while swap space is used to store pages that are not currently in memory.

Here is a table summarizing the differences between virtual memory and swap space:

Feature	Virtual Memory	Swap Space
Definition	A technique for managing memory	A physical location where pages can be stored
Purpose	Allows a computer to use more memory than is physically available	Stores pages that are not currently in memory
Location	In RAM and disk space	On disk space
Access speed	Faster than swap space	Slower than RAM

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What's the difference between "virtual memory" and "swap space"?

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