get server stats from a specfic time
Solution 1:
If you have sysstat installed on your Centos6 you should have sar logs in
/var/log/sa
You can view those with sar command.
Other than that I would recommend installing atop; and running atop daemon. It will provide you with system state snapshots in 10 min intervals. If you need more frequent snapshots it can easily be adjusted.
Once setup you can easily view interval with something like
atop -r snapshot_file -b 14:00 -e 15:00
which would start top like tool that would show interval between 14 and 15h.