High CPU Usage of updating bandwidth

Hi,

is your server running the cpanellogd log processing at peak time ? or any other corn running during this time like backup of your domains?

The issue you facing may be because of this.

You can get more idea about this from the below link.

http://docs.cpanel.net/twiki/pub/AllDocumentation/ReleaseNotes/cPanellogd.pdf

Thank you.