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VirtualBox Users Observe that VirtualBox Processes are Consuming Large Percentage of Host CPU, While Guest VM Reports Significantly Less (Doc ID 1577067.1)

Last updated on MARCH 06, 2017

Applies to:

Oracle VM VirtualBox - Version 4.2 to 5.1 [Release 4.0 to 5.0]
Information in this document applies to any platform.

Symptoms

A user running VirtualBox on Mac OS X may observe that VirtualBox processes are consuming a large percentage of host CPU, while the guest Windows OS consumes significantly less. 

In this particular example, the user reported extended resource consumption of up to 70% of the host CPU, while the Windows Task Manager in the guest virtual machine (VM) reports only 2%.  

Changes

The user has either recently created this Guest VM, or modified an existing VM to include a larger number of Virtual CPUs (VCPUs)

Cause

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