I upgraded my host machine from Xubuntu 18.04 to 20.04. Since then, VirtualBox VMs have become epically slow. It seems to be a similar issue to this thread. Except in my case it affects much more than just kernel updates.
VirtualBox version before and after the OS upgrade remains at 6.0.22 (I can't use 6.1.x). No changes were made to the guest VMs. The only change is the host OS.
I'm uneasy about trying the solution from the other thread, because I do some heavy work loads in my VMs (e.g. compiling software) and I need to be able to use the host OS while that's going. And I never needed to use host I/O cache before.
How to get VirtualBox VM performance to at least as good as what it was under 18.04 host?
Is it unreasonable for me to be concerned about using host I/O cache?
VirtualBox version before and after the OS upgrade remains at 6.0.22 (I can't use 6.1.x). No changes were made to the guest VMs. The only change is the host OS.
I'm uneasy about trying the solution from the other thread, because I do some heavy work loads in my VMs (e.g. compiling software) and I need to be able to use the host OS while that's going. And I never needed to use host I/O cache before.
How to get VirtualBox VM performance to at least as good as what it was under 18.04 host?
Is it unreasonable for me to be concerned about using host I/O cache?