~]# vmstat 1 5
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id wa
 0  0   8776 239644   1296  68716    3    6    30   105  323   256 12  2 85  1
 0  0   8776 239644   1296  68728    0    0     8     0  292   177  7  3 87  3
 1  0   8776 239644   1296  68728    0    0     0     0  274   101  2  0 98  0
 0  0   8776 239644   1296  68728    0    0     0     0  273    52  0  0 100  0
 0  0   8776 239644   1296  68728    0    0     0     0  271    61  0  0 100  0