I have a machine running Ubuntu 16LTS with KVM/QEMU for a hypervisor. It has 1 guest running right now (A Ubuntu Server) that is using less than 1% of it's CPU and about 100MB of the 1000MB RAM allocated to it.
The Host is a 8core AMD with 16GB RAM and at idle with no guest running has a load avg of 0.00. With that one guest vm the host load climbs to a load avg of 2.50 - 2.70 and the fans are spinning at max RPMs and stays like that. This is a new problem noticed within the past day.
What would cause the host to have such a high load when that 1 guest vm is running and using so little resources?
update I'm starting to wonder if it has something to do with other machines connected to the guest vm via samba share. I just restarted the host, the guest, and all physical machines that were connected via samba to the guest vm and all has gone back to normal. Before a restart of the VM host or guest would not resolve anything. After they were both running again the problem would immediately start. However now the VM Host load is back to 0.00 and everything else is working normal. I'm not sure what caused the problem.
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