vmstat has different output format between RHEL5 and RHEL6

Issue

• In RHEL5, we can monitor 'wa' and 'st' value of vmstat by using this command:

[root@rhel570 ~]# vmstat 1 |gawk '/[0-9]$/ {print $1,$2}'
1 0
0 0
0 0

But in RHEL6, we get no output using the same command:

[root@rhel671 ~]# vmstat 1 |gawk '/[0-9]$/ {print $1,$2}'
^C

• vmstat has different output format between RHEL5 and RHEL6.