VM is very slow since upgrading to proxmox v9

Papillon de nuit

New Member
Oct 2, 2025
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Hello,

Since we have upgrading to proxmox v9, we have some VM wich are very slow.

This is the configuration of one of them :



agent: 1
bios: ovmf
boot: order=ide0;ide2
cores: 3
cpu: x86-64-v2-AES
efidisk0: Volume03:vm-141-disk-0,efitype=4m,size=528K
ide0: Volume01:vm-141-disk-0,size=124G
ide1: Volume04:vm-141-disk-0,size=50G
ide2: none,media=cdrom
machine: pc-q35-10.0+pve1,viommu=intel
memory: 12288
meta: creation-qemu=7.2.0,ctime=1682605783
name: SVW-INF-TCA1
net0: e1000=F6:43:F7:FD:A3:C9,bridge=vmbr70,firewall=1
numa: 1
onboot: 1
ostype: win11
scsihw: virtio-scsi-single
smbios1: uuid=53ca0ea7-f531-4c3d-b8a2-d707bbbee292
sockets: 2
tags: PIC;windows
tpmstate0: Volume03:vm-141-disk-1,size=4M,version=v2.0
vmgenid: 169296fb-0b69-4bb8-b3ef-0f33d93e71fd



The IO delay on the hypervisor isn't high (arround 0.07%). The particularity on the host is that her disks is on a FC storage with multiple path to access

Host characteristics :



Dell PowerEdge R720

Intel(R) Xeon(R) CPU E5-2640 0 @ 2.50GHz 6COres 2 Threads

47GB DDR3

Does anyone have an idea?