The below links very useful to find out the IO wait issue,
http://www.chileoffshore.com/en/interesting-articles/126-linux-wait-io-problem
http://askubuntu.com/questions/573957/disabling-journaling-in-ubuntu-14-04
The below links very useful to find out the IO wait issue,
http://www.chileoffshore.com/en/interesting-articles/126-linux-wait-io-problem
http://askubuntu.com/questions/573957/disabling-journaling-in-ubuntu-14-04