Windows 2019 CPU issues

[giuppy]

Hi,
With Windows 2019 (looks like with 2016 is the same) I have CPU almost 100% when creating a VM with just 4 cores and 128GB ram.
The macnhine is configured as below:

boot: order=scsi0;ide2;net0
cores: 4
ide2: none,media=cdrom
machine: pc-i440fx-5.2
memory: 128000
name: SQL12A
net0: virtio=32:A1:38:0C:48:0E,bridge=vmbr0,firewall=1
numa: 0
ostype: win10
scsi0: MAIN:vm-191-disk-0,size=50G
scsi1: NVME:vm-191-disk-0,size=500G
scsi2: MAIN:vm-191-disk-1,size=500G
scsihw: virtio-scsi-pci
smbios1: uuid=4398efba-fb84-4b99-a875-b0...
sockets: 1
tablet: 0

With 8GB ram the machines goes like a rocket.

Any idea or suggestion?
THANKS!

 

[dcsapak]

maybe the ram initialization? you could try to enable hugepages to reduce that time

 

[giuppy]

Yes, it looks like something like this. How to enable it on guest?

 

[dcsapak]

try it with 'qm set ID -hugepages 2 -numa 1' (numa needs to be enabled too for hugepages)

 

[giuppy]

I did it but now I have error and it prevents from booting up

TASK ERROR: start failed: hugepage allocation failed at /usr/share/perl5/PVE/QemuServer/Memory.pm line 542.

 

[dcsapak]

ok, so it can happen that there are not enough free hugepages, (e.g. due to memory fragmentation), you could try to set the hugepages to '1024' (use less bigger ones) or reboot the host, so that the memory is not fragmented yet

 

[giuppy]

same error with 1024.
How can I disable hugepages?

 

[dcsapak]

with 'qm set ID -delete hugepages'

 

[t.lamprecht]

Maybe also worth a try: set the VM's CPU model to host (or try a model matching your HW closely).

 

[giuppy]

I made an attempt with host no big differences.

 

[giuppy]

Are you sure with a reboot I will have it fixed? Because actually on this machine RAM usage is 581.07 GiB out of 1007.78 GiB