procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 1  0    464   2908   5168  94276    0    0    93    50  581  938  1  2 72 25
 0  0    464   2908   5168  94276    0    0     0     0   13   15  0  0 100  0
 0  0    464   2908   5168  94276    0    0     0     0    6    9  0  0 100  0
 0  0    464   2908   5168  94276    0    0     0     0    7   11  0  0 100  0
 0  0    464   2908   5168  94276    0    0     0     0    6    9  0  0 100  0