virtualbox.org

hi i just recently updated VirtualBox and all my guest os are running very slow they each have 4 cores and more than 8 gb of ram

Do the running vms have a green turtle icon instead of the White V on a blue background?

Pichumaster114 wrote:they each have 4 cores and more than 8 gb of ram

This could also explain the slowness, since you haven't provided any evidence that your host can afford to lose 4 cores and 8GB RAM in order to run a VM.

Start the guest from full power off, not save-state. Run until you see the problem happen, then shut down the guest from within the guest OS if possible. If not possible, close the Virtualbox window for the guest with the Power Off option set.

Please right-click the guest in the main Virtualbox window's guest list, choose Show Log. Save the far left tab's log, zip the log file, and post the zip file, using the forum's Upload Attachment tab.

Same here - my Windows Seven VM runs extremely slow, it's been ten minutes already on the startup screen (the animation is moving, one frame every five seconds)

I have the green turtle as someone asked, it says 'native api' - so I guess that's the new way to run VirtualBox,
Until now I had to deactivate HyperV to run VirtualBox (I run the docker engine on the same PC, and the two cannot live together since Docker requires the Hypervisor to run, and VBox failed to start when it's activated.

I wonder if this is definitive (this is so slow that the 'native engine' is just unusable for me), or if something can be done to speed up the VM ?

For now, Hyper-v present == extremely slow VM. Maybe in future things will improve, but right now (VirtualBox 6.1.16) that's how it is.

If you don't need Hyper-v then disable it. See post #3 of FAQ: I have a 64bit host, but can't install 64bit guests.