And to continue about the RAM. Here is an example from a mostly idle test KVM machine i have. This is what is seen inside the VM:
top - 13:21:23 up 22:43, 1 user, load average: 0.00, 0.00, 0.00
Tasks: 52 total, 1 running, 51 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.3%sy...