On Thursday 21 September 2017, Jim Perrin jperrin@centos.org wrote:
Last week we noticed that the default scheduler isn't being set properly in CentOS 7. I haven't checked this for CentOS 6, but it might be worth exploring.
On my CentOS 6 system, tuned wasn't installed by default, but when I installed it and followed your instructions, that did seem to improve some programs' performance considerably.