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Thread: swap file usage always at 0%, is it disabled?

  1. #1
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    swap file usage always at 0%, is it disabled?

    I recently added a screenlet that shows usage for RAM, CPU and swap file. The RAM and CPU respond as expected to actions that would increase demand on them but the swap always sits at 0% no matter what I am doing.

    How can I test that it is even working, or working right? Could my swap file use be disabled? I have a live CD install of 8.10 64 bit.
    Q6600 Quad Core @2.4GHz, 1333MHz FSB, 4GB DDR1066 DDR2

  2. #2
    Join Date
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    Re: swap file usage always at 0%, is it disabled?

    it's possible you have a lot of ram and the system never needs to use it

    double check system>admin>system monitor>resources tab

    you can do

    sudo swapon -a

    then check again. as long as there's a swap entry in /etc/fstab it will activate it

  3. #3
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    Re: swap file usage always at 0%, is it disabled?

    open a terminal, run
    Code:
    sudo apt-get install htop
    then
    Code:
    htop
    and you'll have a nice overview over your system.

  4. #4
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    Re: swap file usage always at 0%, is it disabled?

    In a terminal, run
    Code:
    free -m
    Does it report a non-zero total swap? (Look in the last row, first column.)
    ...

  5. #5
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    Re: swap file usage always at 0%, is it disabled?

    Quote Originally Posted by hyper_ch View Post
    open a terminal, run
    Code:
    sudo apt-get install htop
    then
    Code:
    htop
    and you'll have a nice overview over your system.
    yeah, htop is great, it's what i use--no ram-hogging gui and it makes killing apps easy

  6. #6
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    Re: swap file usage always at 0%, is it disabled?

    Thanks for the recommendation, htop rocks (i always used system monitor)

  7. #7
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    Re: swap file usage always at 0%, is it disabled?

    I have 4 GB of RAM and system monitor is showing 0 of 1.8GB used for the swap file. So I guess I just have enough RAM that I don't need it. RAM was 850MB of 4GB used.
    Q6600 Quad Core @2.4GHz, 1333MHz FSB, 4GB DDR1066 DDR2

  8. #8
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    Re: swap file usage always at 0%, is it disabled?

    if you're on 32bit you can't use more than 4gb ram anyway.

  9. #9
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    Re: swap file usage always at 0%, is it disabled?

    The following link will give further information about the swap file usage.

    http://www.cyberciti.biz/tips/linux-swap-space.html

    nixCraft is a nice site, keeping good guides to GNU/Linux usage.

  10. #10
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    Re: swap file usage always at 0%, is it disabled?

    Quote Originally Posted by Kill Vista View Post
    I have 4 GB of RAM and system monitor is showing 0 of 1.8GB used for the swap file. So I guess I just have enough RAM that I don't need it. RAM was 850MB of 4GB used.
    I have 2GB RAM, and have never touched swap--and I do have quite a few programs running concurrently.

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