This is probably true, but VB is not servergrade VM software I believe. In those cases you use Xen or VMware. Virtualbox is for the desktop. First, I think man

This is probably true, but VB is not servergrade VM software I believe. In those cases you use Xen or VMware. Virtualbox is for the desktop. First, I think many engineers at Oracle use it to test software locally without having to fallback on complex solutions. Second, it's probably a small development team, maybe three or four FTE, and how much money is that for a company like Oracle? VMware licenses are probably more expensive.