https://www.mankier.com/8/vmstat
http://docs.oracle.com/cd/E23824_01/html/821-1451/spmonitor-22.html
http://www.linuxcommand.org/man_pages/vmstat8.html
http://docs.oracle.com/cd/E23824_01/html/821-1462/vmstat-1m.html
原文：http://www.cnblogs.com/WCFGROUP/p/5906133.html