Take the 2-minute tour ×  I am stuck with this one.  Clean
install Ubuntu 12.04 server 64bit on two physical machines.
Machines are identical except one has 8GB RAM and the problem
machine has 32GB RAM, both machines were purchased with
identical specifications at the same time. Ubuntu fully updated
as of 24 hours ago.  I am using virt-manager through X-windows
over SSH tunnel to manage the virtual machines, the server OS
doesn't run X-windows sessions at all, my desktop does.  Built
and ran multiple Ubuntu 12.04 server 64bit virtual machines,
each with 1GB RAM allocated. The VMs are all basically
configured the same (forgiving MAC addresses, etc).  The 8GB
machine has 2xVMs and the 32GB machine has 3x VMs. All virtual
machines are reporting low load (less than 0.5, normally 0.01)
and are not highly utilised at all.  8GB host server is
reporting load of less than 0.1, normally 0.01. 32GB host server
is reporting load of greater than 10.0 sustained. Again, all VMs
are reporting internal load of less than 0.5.