Am 08.02.2016 um 22:25 schrieb Gokan Atmaca: >>>> If you run top what are you seeing on the %Cpu(s) line? > http://i.hizliresim.com/NrmV9Y.png That's not a CentOS system. You should probably consult the community providing support for your Debian or Ubuntu based system. I see you run MySQL, so verify your database configuration against the discussion at https://serverfault.com/questions/363355/io-wait-causing-so-much-slowdown-ext4-jdb2-at-99-io-during-mysql-commit Alexander