In `atop`, does MEM (the percentage figure) reflect PSIZE or only RSIZE?

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When PSIZE is available, does atop use it to make the MEM figure more useful, or does the MEM figure in atop always reflect RSIZE (RSS)?



The manpage seems unhelpful.




MEM



The occupation percentage of this process related to the available capacity for this resource on system level.








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    up vote
    0
    down vote

    favorite












    When PSIZE is available, does atop use it to make the MEM figure more useful, or does the MEM figure in atop always reflect RSIZE (RSS)?



    The manpage seems unhelpful.




    MEM



    The occupation percentage of this process related to the available capacity for this resource on system level.








    share|improve this question






















      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      When PSIZE is available, does atop use it to make the MEM figure more useful, or does the MEM figure in atop always reflect RSIZE (RSS)?



      The manpage seems unhelpful.




      MEM



      The occupation percentage of this process related to the available capacity for this resource on system level.








      share|improve this question












      When PSIZE is available, does atop use it to make the MEM figure more useful, or does the MEM figure in atop always reflect RSIZE (RSS)?



      The manpage seems unhelpful.




      MEM



      The occupation percentage of this process related to the available capacity for this resource on system level.










      share|improve this question











      share|improve this question




      share|improve this question










      asked Feb 18 at 11:04









      sourcejedi

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          1 Answer
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          accepted










          I tested on atop-2.3.0-8.fc27.x86_64.



          RSIZE, not PSIZE, is used when sorting by memory usage (use the M key), and for the MEM column.



          RSIZE PSIZE MEM
          311.0M 260.2M 4%
          303.3M 288.1M 4%
          217.6M 123.1M 3%


          More detailed output:



           PID TID MINFLT MAJFLT VSTEXT VSLIBS VDATA VSTACK VSIZE RSIZE PSIZE VGROW RGROW SWAPSZ RUID EUID MEM CMD

          1782 - 2413 0 16K 96480K 361.5M 288K 3.8G 311.0M 260.2M 10772K 9448K 0K alan alan 4% gnome-shell
          1455 - 0 0 280K 30860K 340.8M 132K 1.0G 303.3M 288.1M 0K 0K 0K root root 4% packagekitd
          13561 - 41988 34 196K 143.2M 298.0M 136K 2.2G 217.6M 123.1M 255.3M 139.0M 0K alan alan 3% Web Content
          13333 - 25219 0 196K 119.6M 277.9M 144K 2.1G 190.9M 111.9M 0K 3560K 0K alan alan 2% Web Content


          https://www.atoptool.nl/screenshots.php




          The memory percentage (column MEM) shows the resident memory occupation by this process, because that is what matters when your system starts swapping.




          https://www.atoptool.nl/download/case_leakage.pdf




          The memory details (subcommand 'm') show the current RSS per process in the column RSIZE and (as a percentage of the total memory installed) in the column MEM.







          share|improve this answer




















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            up vote
            0
            down vote



            accepted










            I tested on atop-2.3.0-8.fc27.x86_64.



            RSIZE, not PSIZE, is used when sorting by memory usage (use the M key), and for the MEM column.



            RSIZE PSIZE MEM
            311.0M 260.2M 4%
            303.3M 288.1M 4%
            217.6M 123.1M 3%


            More detailed output:



             PID TID MINFLT MAJFLT VSTEXT VSLIBS VDATA VSTACK VSIZE RSIZE PSIZE VGROW RGROW SWAPSZ RUID EUID MEM CMD

            1782 - 2413 0 16K 96480K 361.5M 288K 3.8G 311.0M 260.2M 10772K 9448K 0K alan alan 4% gnome-shell
            1455 - 0 0 280K 30860K 340.8M 132K 1.0G 303.3M 288.1M 0K 0K 0K root root 4% packagekitd
            13561 - 41988 34 196K 143.2M 298.0M 136K 2.2G 217.6M 123.1M 255.3M 139.0M 0K alan alan 3% Web Content
            13333 - 25219 0 196K 119.6M 277.9M 144K 2.1G 190.9M 111.9M 0K 3560K 0K alan alan 2% Web Content


            https://www.atoptool.nl/screenshots.php




            The memory percentage (column MEM) shows the resident memory occupation by this process, because that is what matters when your system starts swapping.




            https://www.atoptool.nl/download/case_leakage.pdf




            The memory details (subcommand 'm') show the current RSS per process in the column RSIZE and (as a percentage of the total memory installed) in the column MEM.







            share|improve this answer
























              up vote
              0
              down vote



              accepted










              I tested on atop-2.3.0-8.fc27.x86_64.



              RSIZE, not PSIZE, is used when sorting by memory usage (use the M key), and for the MEM column.



              RSIZE PSIZE MEM
              311.0M 260.2M 4%
              303.3M 288.1M 4%
              217.6M 123.1M 3%


              More detailed output:



               PID TID MINFLT MAJFLT VSTEXT VSLIBS VDATA VSTACK VSIZE RSIZE PSIZE VGROW RGROW SWAPSZ RUID EUID MEM CMD

              1782 - 2413 0 16K 96480K 361.5M 288K 3.8G 311.0M 260.2M 10772K 9448K 0K alan alan 4% gnome-shell
              1455 - 0 0 280K 30860K 340.8M 132K 1.0G 303.3M 288.1M 0K 0K 0K root root 4% packagekitd
              13561 - 41988 34 196K 143.2M 298.0M 136K 2.2G 217.6M 123.1M 255.3M 139.0M 0K alan alan 3% Web Content
              13333 - 25219 0 196K 119.6M 277.9M 144K 2.1G 190.9M 111.9M 0K 3560K 0K alan alan 2% Web Content


              https://www.atoptool.nl/screenshots.php




              The memory percentage (column MEM) shows the resident memory occupation by this process, because that is what matters when your system starts swapping.




              https://www.atoptool.nl/download/case_leakage.pdf




              The memory details (subcommand 'm') show the current RSS per process in the column RSIZE and (as a percentage of the total memory installed) in the column MEM.







              share|improve this answer






















                up vote
                0
                down vote



                accepted







                up vote
                0
                down vote



                accepted






                I tested on atop-2.3.0-8.fc27.x86_64.



                RSIZE, not PSIZE, is used when sorting by memory usage (use the M key), and for the MEM column.



                RSIZE PSIZE MEM
                311.0M 260.2M 4%
                303.3M 288.1M 4%
                217.6M 123.1M 3%


                More detailed output:



                 PID TID MINFLT MAJFLT VSTEXT VSLIBS VDATA VSTACK VSIZE RSIZE PSIZE VGROW RGROW SWAPSZ RUID EUID MEM CMD

                1782 - 2413 0 16K 96480K 361.5M 288K 3.8G 311.0M 260.2M 10772K 9448K 0K alan alan 4% gnome-shell
                1455 - 0 0 280K 30860K 340.8M 132K 1.0G 303.3M 288.1M 0K 0K 0K root root 4% packagekitd
                13561 - 41988 34 196K 143.2M 298.0M 136K 2.2G 217.6M 123.1M 255.3M 139.0M 0K alan alan 3% Web Content
                13333 - 25219 0 196K 119.6M 277.9M 144K 2.1G 190.9M 111.9M 0K 3560K 0K alan alan 2% Web Content


                https://www.atoptool.nl/screenshots.php




                The memory percentage (column MEM) shows the resident memory occupation by this process, because that is what matters when your system starts swapping.




                https://www.atoptool.nl/download/case_leakage.pdf




                The memory details (subcommand 'm') show the current RSS per process in the column RSIZE and (as a percentage of the total memory installed) in the column MEM.







                share|improve this answer












                I tested on atop-2.3.0-8.fc27.x86_64.



                RSIZE, not PSIZE, is used when sorting by memory usage (use the M key), and for the MEM column.



                RSIZE PSIZE MEM
                311.0M 260.2M 4%
                303.3M 288.1M 4%
                217.6M 123.1M 3%


                More detailed output:



                 PID TID MINFLT MAJFLT VSTEXT VSLIBS VDATA VSTACK VSIZE RSIZE PSIZE VGROW RGROW SWAPSZ RUID EUID MEM CMD

                1782 - 2413 0 16K 96480K 361.5M 288K 3.8G 311.0M 260.2M 10772K 9448K 0K alan alan 4% gnome-shell
                1455 - 0 0 280K 30860K 340.8M 132K 1.0G 303.3M 288.1M 0K 0K 0K root root 4% packagekitd
                13561 - 41988 34 196K 143.2M 298.0M 136K 2.2G 217.6M 123.1M 255.3M 139.0M 0K alan alan 3% Web Content
                13333 - 25219 0 196K 119.6M 277.9M 144K 2.1G 190.9M 111.9M 0K 3560K 0K alan alan 2% Web Content


                https://www.atoptool.nl/screenshots.php




                The memory percentage (column MEM) shows the resident memory occupation by this process, because that is what matters when your system starts swapping.




                https://www.atoptool.nl/download/case_leakage.pdf




                The memory details (subcommand 'm') show the current RSS per process in the column RSIZE and (as a percentage of the total memory installed) in the column MEM.








                share|improve this answer












                share|improve this answer



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                answered Feb 18 at 11:04









                sourcejedi

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