How to sync time on host wake-up within VirtualBox?

Question

I am running an Ubuntu 12.04-based box inside of Vagrant using VirtualBox. So far, everything is fine - except for one thing:

Let\'s assume that the VM is running. T

Answer 1

The documentation lacks some details here.

What VirtualBox does every 10 seconds is just slight adjustement (something like 0.005 seconds). Only when the time difference reaches a threshold (20 minutes by default) a "real" resync is done.

You can reduce the thresold (i.e. to 10 seconds) with the following command:

VBoxManage guestproperty set  "/VirtualBox/GuestAdd/VBoxService/--timesync-set-threshold" 10000