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    Virtual Memory

    Uploaded by

    AKASH S R
    Virtual memory allows a computer to use part of its hard disk as extra memory. This gives users the illusion that they have more RAM than is physically installed. The operating system loads different parts of multiple processes into physical memory to increase CPU usage. When memory runs low, unused pages are written to disk to make room for new pages, without stopping processes from loading. This automatic swapping allows for unlimited RAM but can slow performance due to disk access times.

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    Virtual Memory

    Uploaded by

    AKASH S R
    21 views4 pages
    Virtual memory allows a computer to use part of its hard disk as extra memory. This gives users the illusion that they have more RAM than is physically installed. The operating system loads different parts of multiple processes into physical memory to increase CPU usage. When memory runs low, unused pages are written to disk to make room for new pages, without stopping processes from loading. This automatic swapping allows for unlimited RAM but can slow performance due to disk access times.

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    Virtual memory allows a computer to use part of its hard disk as extra memory. This gives users the illusion that they have more RAM than is physically installed. The operating system loads different parts of multiple processes into physical memory to increase CPU usage. When memory runs low, unused pages are written to disk to make room for new pages, without stopping processes from loading. This automatic swapping allows for unlimited RAM but can slow performance due to disk access times.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    21 views4 pages

    Virtual Memory

    Uploaded by

    AKASH S R
    Virtual memory allows a computer to use part of its hard disk as extra memory. This gives users the illusion that they have more RAM than is physically installed. The operating system loads different parts of multiple processes into physical memory to increase CPU usage. When memory runs low, unused pages are written to disk to make room for new pages, without stopping processes from loading. This automatic swapping allows for unlimited RAM but can slow performance due to disk access times.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 4

    Virtual Memory

    Done BY :
    Akash S.R
     Virtual Memory is a storage scheme that provides user an illusion of
    having a very big main memory. This is done by treating a part of
    secondary memory as the main memory.
     In this scheme, User can load the bigger size processes than the
    available main memory by having the illusion that the memory is
    available to load the process.
     Instead of loading one big process in the main memory, the Operating
    System loads the different parts of more than one process in the main
    memory.
     By doing this, the degree of multiprogramming will be increased and therefore,
    the CPU utilization will also be increased.
    How Virtual Memory Works
     In modern word, virtual memory has become quite common these
    days. In this scheme, whenever some pages needs to be loaded in
    the main memory for the execution and the memory is not
    available for those many pages, then in that case, instead of
    stopping the pages from entering in the main memory, the OS
    search for the RAM area that are least used in the recent times or
    that are not referenced and copy that into the secondary memory
    to make the space for the new pages in the main memory.
     Since all this procedure happens automatically, therefore it makes
    the computer feel like it is having the unlimited RAM.
     Advantages of Virtual Memory

    1. The degree of Multiprogramming will be increased.


    2. User can run large application with less real RAM.
    3. There is no need to buy more memory RAMs.

    Disadvantages of Virtual Memory


    1. The system becomes slower since swapping takes time.
    2. It takes more time in switching between applications.
    3. The user will have the lesser hard disk space for its use.

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