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Problem is same even if I run another standard VM with little RAM beside Windows 2003. Pause or unpaused - no difference.

On quad core linux host (latest vbox 3.2.10, or older OSE 3.2.6) I run one Windows 2003 virtual machine. If this machine is idle there is high cpu usage, for which I googled the solution - that is running one small dummy virtual machine and pause it. Thus I have 1) Windows 2003, 2048Mb RAM , 1vCPU e...

Maybe I found out the problem. Is is not the Windows guest but running two guests that is the problem I run one small dummy guest (32mb) that is paused, which is one kind of solution for high cpu usage when one (Windows) machine is idle. If I completely turn off this dummy paused guest machine, thin...

I forgot to add that while monitoring CPU, I see 80-100% on Windows 2003 guest (1 vCPU), while on Linux 64bit hosts (using mpstat) I see only around 50% usage on one core, others are idle.
I am running only this virtual machine.

Hi, I am running VirtualBox 3.1.6 on Linux 64bit hosts AMD64 OS Ubuntu Server 10.4 LTS, quad core Xeon, previously on 32bit. I have a Window 2003 server guest running, doing intense compilation. No matter what I do, I cannot get the best out of CPU performance as I did on same machine, but 32bit Lin...