Sometimes some commands can give you not aligned output like this:

procs ———–memory———- —swap– —–io—- –system– —–cpu—–
r b swpd free buff cache si so bi bo in cs us sy id wa st
12 0 7406848 361600 215560 7777776 0 0 38 83 0 0 20 7 65 8 0
25 0 7406848 366428 215560 7778240 0 0 24 28 9946 6872 52 19 28 1 0
24 0 7406848 371024 215568 7778736 0 0 36 396 10088 5820 65 19 15 0 0
37 0 7406844 374752 215568 7779248 0 0 0 88 10317 6669 59 15 25 0 0
29 2 7406844 377488 215568 7779804 0 0 152 712 10984 6304 59 18 21 1 0

what to do?
Percona can suggest some perl based tools:

wget percona.com/get/pt-align && chmod +x  pt-align &&  \cp ./pt-align /usr/bin/al

Now:

vmstat 1 5 | al