Have you checked in the VM's device manager that all devices are using virtio drivers (disk, disk controller, nic adapter etc)
Gary Dixon Quadris Cloud Manager +44 (0) 161 537 4980 +44 (0) 7989 717661 gary.di...@quadris.co.uk www.quadris.com Innovation House, 12-13 Bredbury Business Park Bredbury Park Way, Bredbury, Stockport, SK6 2SN -----Original Message----- From: Alexandru Stan <alexandru.s...@lifeincloud.com.INVALID> Sent: Thursday, May 23, 2024 11:17 AM To: users@cloudstack.apache.org Subject: RE: Windows VM performance in ACS Hi Gary, That’s what I used when registering the ISO. Doesn’t seem to help at all unfortunately. From: Gary Dixon <gary.di...@quadris.co.uk.INVALID> Sent: Thursday, May 23, 2024 1:14 PM To: users@cloudstack.apache.org Subject: RE: Windows VM performance in ACS HI Alexandru We use "Windows PV" OS type on our Windows VM's - this provides the Hyper-V enlightenments. BR Gary [cid:image795113.png@DAEF2351.E3855BD4] Gary Dixon Quadris Cloud Manager [cid:image752066.png@3A68EBBE.280BF225] +44 (0) 161 537 4980<tel:+44%20(0)%20161%20537%204980> +44 (0) 7989 717661<tel:+44%20(0)%207989%20717661> [cid:image143416.png@CD1E068B.3BF4E714] gary.di...@quadris.co.uk<mailto:gary.di...@quadris.co.uk> [cid:image596607.png@BDE27FFF.72E872DF] http://www.quadris.com/<http://www.quadris.com/> [cid:image382983.png@B32DDBFC.505CE7AD] Innovation House, 12‑13 Bredbury Business Park Bredbury Park Way, Bredbury, Stockport, SK6 2SN -----Original Message----- From: Alexandru Stan <alexandru.s...@lifeincloud.com.INVALID<mailto:alexandru.s...@lifeincloud.com.INVALID>> Sent: Thursday, May 23, 2024 10:40 AM To: users@cloudstack.apache.org<mailto:users@cloudstack.apache.org> Subject: Windows VM performance in ACS Hi everyone, Is there anything that must be done to improve the performance of Windows VMs in ACS? I tried to deploy a W10 instance, with the virtio drivers, and the performance is very, very poor (for example it took almost 3 hours to install a CU, the actual setup took about 50 minutes and so on). The hypervisor kvm on a HP server, with ssd's for storage. In other apps there are those hyper-v enlightments that can be enabled for Windows guests and it really makes a difference, but I have no idea if this is a thing in ACS too. If someone has some info on this, please share. Thank you!