$ 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 st
0 0 224 495336 219080 2382692 0 0 1 18 0 0 0 0 99 0 0
0 0 224 495336 219080 2382692 0 0 0 0 1023 3054 0 0 100 0 0
0 0 224 495336 219080 2382692 0 0 0 32 1031 3074 0 0 100 0 0
0 0 224 495336 219080 2382692 0 0 0 0 1011 3057 0 0 100 0 0
0 0 224 494964 219080 2382692 0 0 0 0 1056 3076 0 0 100 0 0
$
$ vmstat 1 86400 | awk '{print strftime("%Y/%m/%d %H:%M:%S"), $0} { system(":") }'
2016/01/07 06:22:20 procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
2016/01/07 06:22:20 r b swpd free buff cache si so bi bo in cs us sy id wa st
2016/01/07 06:22:20 2 0 0 82040 38108 255436 0 0 28 6 1019 44 0 1 99 0 0
2016/01/07 06:22:21 0 0 0 81776 38108 255436 0 0 0 0 1007 58 0 0 100 0 0
2016/01/07 06:22:22 0 0 0 81776 38108 255436 0 0 0 0 1025 59 0 2 98 0 0
2016/01/07 06:22:23 0 0 0 81776 38108 255436 0 0 0 0 1002 38 0 1 99 0 0
2016/01/07 06:22:24 0 0 0 81776 38108 255436 0 0 0 0 1024 55 1 0 99 0 0
2016/01/07 06:22:25 0 0 0 81776 38116 255436 0 0 0 56 999 46 0 1 99 0 0