http://pages.citebite.com/p4x3a0r8pmhm
http://stackoverflow.com/a/2077182/1046569
http://www.cyberciti.biz/faq/mysql-datadir-files-stored-unix-linux/
http://dba.stackexchange.com/a/6107
http://serverfault.com/questions/355750/mysql-lowering-wait-timeout-value-to-lower-number-of-open-connections
madvens 