Something

amhso@Alex:~$ vmstat 2 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      0 642796  37564 198616    0    0   303    44  359  814  7  1 91  0
 1  0      0 642748  37620 198616    0    0     0    52  376  987  0  0 100  0
 1  0      0 642736  37620 198616    0    0     0     0  363  907  3  0 97  0
 1  0      0 642700  37656 198616    0    0     0    32  403 1018  1  0 99  0
 1  0      0 642700  37656 198616    0    0     0     0  384  965  0  0 100  0