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    Don't Undestand Memory Stats

    Hi
    Just installed Kabuntu 20.04 LTS as a dual boot on the harddrive. I went through the on- screen prompts and for the dual boot selected 50GB to allocate to Kabuntu.
    All is good so far.

    I don't quite understand the memory stats Kabuntu is showing:

    I opened Dolphin and it shows: HOME: 31.5 GB free
    That seems ok.


    When I go to KInforCenter > Memory:
    it shows the following:

    Total physical memory: 3.2. Gib
    Free physical memory: 723 Mib
    Shared memory: 44 Mib
    Disk Buffers: 35.9 Mib
    Disk cache: 604 Mib

    These numbers seems rather low. If I allocated 50GB to Kabuntu shouldn't they be higher?
    I wonder am I running out of memory?

    Thanks






    #2
    The 31.5 GB is storage, what you've called the "harddrive", the 3.2 GiB is RAM (random access memory).
    Regards, John Little

    Comment


      #3
      Ok thanks.

      So these small numbers are not an issue?
      Free physical memory: 723 Mib, Shared memory: 44 Mib, Disk Buffers: 35.9 Mib, Disk cache: 604 Mib

      I followed the online menus for installation should I assume they are automatically created.

      Comment


        #4
        Disregard - I opened 8 applications and the memory stats adjusted downwards, but still everything was running smoothly.
        I suppose it depends on the RAM as you mentioned.

        Comment


          #5
          I didn't have time to study these, but they both look useful and explain some of these issues, apparent and "real":

          https://unix.stackexchange.com/quest...-buffers-cache
          https://community.fireeye.com/s/article/000002198

          (My Google search string was: shared memory, disk buffers, disk cache. Lots of good things popped up.)
          An intellectual says a simple thing in a hard way. An artist says a hard thing in a simple way. Charles Bukowski

          Comment


            #6
            Hey thanks. I did read those, the best line was:
            You have 10 giga free RAM. If a monitoring system alerts you about that - fix the monitoring system.
            Being new to Kabuntu I was more curious if was my computer - seeing how no one else has posted on this and the huge number of downloads, doesn't seem like a problem.
            As John noted it's the RAM number that is key.

            The system is fast even with 7 applications open. Thx

            Comment


              #7
              This :
              linuxatemyram.com
              Your personal search bot

              Comment


                #8
                Thanks, very interesting. (Someone actually registered a domain for this - must be a hot topic.)

                I ran 'free -m' - I have 698Mib

                From the link this point make it all clear:
                To see how much ram your applications could use without swapping,



                Comment


                  #9
                  Originally posted by eriknext View Post
                  Thanks, very interesting. (Someone actually registered a domain for this - must be a hot topic.)
                  It is an old topic ,
                  Memory usage is definitely different from Windows, and has been a common point of confusion for new users for as long as I can remember - the page has been around since at least 2009.
                  Your personal search bot

                  Comment


                    #10
                    Good to know. Yup, windows is different for sure. I was on another linux os for 2 years and first time with ubunutu, plus I just purchased a used laptop so was wondering if it might have been my computer. Thanks.

                    Comment


                      #11
                      I also use
                      Code:
                      vmstat -s
                      to check ram usage.
                      Boot Info Script

                      Comment

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