Server 2016 Guests Slow and Sluggish

Hi,

We've started deploying Server 2016 VMs to migrate away from Server 2008, but they seem to be sooo painfully sluggish and slow. I've read about disabling the UNMAP feature with the following commands:

fsutil behavior set DisableDeleteNotify NTFS 1

fsutil behavior set DisableDeleteNotify ReFS 1

These commands have been run a few weeks ago, but still the performance of the VM is no different, they are almost unusable. Any one got any other ideas or suggestions?

Currently running VCSA 6.5 with ESX 6.0 hosts. Both at the latest build levels.

We don't have any of these issues on 2008 servers.