wendel@develop ~
$ vmstat 5 10
   procs                      memory      swap          io     system      cpu
 r  b  w   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id
 0  0  0 201948  51692 202216 452744    0    0     2     0    2     1  1  1  1
 0  0  0 201948  51692 202228 452744    0    0     0    10  149   196  1  0 98
 0  0  0 201948  51692 202228 452744    0    0     0     0  132   182  1  0 99
 0  0  0 201948  51692 202228 452744    0    0     0     0  110   136  0  1 98
 0  0  0 201948  51692 202232 452744    0    0     0    29  108   113  1  2 98
 0  0  0 201948  51692 202232 452744    0    0     0    42  111   112  0  0 99
 0  0  0 201948  51692 202232 452744    0    0     0     0  109   135  0  0 100
 0  0  0 201948  51692 202232 452744    0    0     0     0  107   130  1  0 99
 0  0  0 201948  51692 202232 452744    0    0     0     0  110   136  1  1 99
 0  0  0 201948  51692 202232 452744    0    0     0     0  116   156  1  0 99
wendel@develop ~
$ vmstat 5 10
   procs                      memory      swap          io     system      cpu
 r  b  w   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id
 1  0  0 201936  92416 202284 452744    0    0     2     0    2     1  1  1  1
 1  0  0 201936  83428 202296 452744    0    0     0    41  107   128 19  1 80
 0  0  0 201936  73672 202304 452744    0    0     0    50  106   121 22  1 77
 1  0  0 201936  78388 202312 452744    1    0     1    38  105   121 17  2 81
 1  0  0 201936  81252 202324 452744    0    0     0    42  109   133 19  1 80
 1  0  0 201936  84052 202328 452748    2    0     3    42  158   144 22  2 76
 1  0  0 201936  74168 202336 452748    1    0     1    73  141   161 21  3 76
 0  0  0 201936  63516 202348 452748    2    0     2    80  117   155 24  1 75
 0  0  0 201936  63516 202356 452748    0    0     0    42  111   138  0  1 99
 0  0  0 201936  63516 202356 452748    0    0     0     0  130   185  0  0 99