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Thread: Cached memory?

  1. #1
    Join Date
    Jun 2010
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    40
    Distro
    Ubuntu 10.04 Lucid Lynx

    Cached memory?

    Hello,

    A system load indicator applet that I installed shows me memory usage. It divides usage up into several categories, one of which is "cache." Is this data that is cached from the hard drive? What does this represent, exactly?

    Thanks very much for any help!

  2. #2
    Join Date
    Feb 2010
    Location
    U.K.
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    782
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Cached memory?

    Yes it is data cached from the hard drive to try to improve application performance. The memory is still available for use by applications should they need it.

    There's a good explanation here:
    http://www.linuxatemyram.com

  3. #3
    Join Date
    Jan 2010
    Location
    Kolkata India
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    Hidden!
    Distro
    Ubuntu

    Re: Cached memory?

    total used free shared buffers cached
    Mem: 237 200 37 0 6 146
    -/+ buffers/cache: 47 189
    Swap: 511 8 503
    when you run free -m/g or whatever , under -/+ buffers/cache: and free column you can see the actual memory that is free and available to applications to be consumed .
    In the above snapshot 47 megs is the amount of memory actually used by the system and free memory is 189 megs which your upcoming applications can use .
    “Progress is made by lazy men looking for easier ways to do things”
    — Robert A. Heinlein

  4. #4
    Join Date
    Jun 2010
    Beans
    40
    Distro
    Ubuntu 10.04 Lucid Lynx

    Re: Cached memory?

    Perfect, thanks very much!

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