[root@* /]# vmstat 5 5
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 0  0  41760 1733668      0 159464    0    0     1    10    0    0  1  0 99  0  0
 0  0  41760 1733660      0 159464    0    0     0     2    0   13  0  0 100  0  0
 0  0  41760 1733660      0 159464    0    0     0     0    0   13  0  0 100  0  0
 0  0  41760 1733664      0 159464    0    0     0     0    0   11  0  0 100  0  0
 0  0  41760 1730968      0 159464    0    0     0    14    0  103  0  0 99  0  0
[root@* /]# vmstat 5 5
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 0  0  41760 1730936      0 159468    0    0     1    10    0    0  1  0 99  0  0
 0  0  41760 1733656      0 159468    0    0     0     0    0   19  0  0 100  0  0
 0  0  41760 1733660      0 159468    0    0     0     1    0   22  0  0 100  0  0
 0  0  41760 1733660      0 159468    0    0     0     0    0   11  0  0 100  0  0
 0  0  41760 1733656      0 159468    0    0     0     0    0   22  0  0 100  0  0