A little bit background info.. We have one main content heavy website that is quite busy with lots of traffic. Hosting is on dedicated server in it's own cpanel account.
We have other domains too but they don't get that much traffic. Earlier they were in same cpanel account as main site ( as addon domains) but we later on moved them with each one having it's own cpanel account ( for better security).
We need to add 3 more domains now which will be very light sites with little traffic but they may get more traffic as we start advertising them. We need to decide between whether it's better to host 3 light sites ( basically 1-4 page sites) on ONE cpanel account OR to host them in separate cpanel account for each one of them.
Would creating new cpanel accounts for each domain add to the overhead of CPU usage or cause unnecessary load on server as compared to all 3 of them in one cpanel account?
Also is there any way to make sure that our Main site domain and it's cpanel gets preference when it comes to CPU and server resources?