Dear forum members,
We are facing the following issue.
When I create a Windows server 2019 standard VPS with 2 sockets / 8 cores and 128GB RAM the VPS becomes very laggy or windows keeps loading.
When I use only 1 socket and core the VM runs normally. If I change the RAM to 8GB and 2 sockets and 8 cores the VM also runs normally but not when I assign 2 sockets with 8 cores and 128GB RAM.
We have tried the following scenario’s and are experiencing the following issues:
It seems that when we add more than 8 GB of ram with multiple cores, the VM becomes horribly slow. If the core count is low and the memory count is high, there is no problem.
I have tried the following things already:
VPS Config:
NAMU:
RAM:
Proxmox:
VPS node specs:
We are facing the following issue.
When I create a Windows server 2019 standard VPS with 2 sockets / 8 cores and 128GB RAM the VPS becomes very laggy or windows keeps loading.
When I use only 1 socket and core the VM runs normally. If I change the RAM to 8GB and 2 sockets and 8 cores the VM also runs normally but not when I assign 2 sockets with 8 cores and 128GB RAM.
We have tried the following scenario’s and are experiencing the following issues:
- 1 socket with 16 cores and 8 GB ram is fast
- 1 socket with 1 core and 128 GB is ram is fast
- 1 socket and 4 cores and 64 GB of ram is very slow
- 1 socket and 16 cores and 64 GB of ram is very slow
- 2 sockets and 8 cores each with 64 gb ram is very slow
It seems that when we add more than 8 GB of ram with multiple cores, the VM becomes horribly slow. If the core count is low and the memory count is high, there is no problem.
I have tried the following things already:
- Enabled NUMA on all VMS with stop and start
- Serval CPU models (host,kvm64,qemu64)
- Disabled Balloon on all VMs
- Disabled memory hot plugging
VPS Config:
Code:
root@kvm110:~# qm config 914
acpi: 1
agent: 0
balloon: 0
boot: order=virtio0;ide2
cores: 8
cpu: host
hotplug: 0
ide2: local:iso/17763.737.190906-2324.rs5_release_svc_refresh_SERVER_EVAL_x64FRE_en-us_1.iso,media=cdrom,size=5172572K
kvm: 1
machine: pc-i440fx-6.1
memory: 131072
meta: creation-qemu=6.1.0,ctime=1642522328
name: windows
net0: virtio=5E:68:73:44:78:F1,bridge=vmbr0,firewall=1,tag=150
numa: 1
ostype: l26
scsihw: virtio-scsi-pci
smbios1: uuid=7344a447-35a3-44fe-99bc-9e7f2971d9fe
sockets: 2
tablet: 1
virtio0: local-zfs:vm-914-disk-0,size=500G
vmgenid: 4d76a202-cda3-4419-a5a6-8c24d4fc5f9d
root@kvm110:~#NAMU:
Code:
root@kvm110:~# numactl --hardware
available: 2 nodes (0-1)
node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
node 0 size: 257827 MB
node 0 free: 211939 MB
node 1 cpus: 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
node 1 size: 257993 MB
node 1 free: 201803 MB
node distances:
node 0 1
0: 10 32
1: 32 10RAM:
Code:
root@kvm110:~# free -g
total used free shared buff/cache available
Mem: 503 99 403 0 0 401Proxmox:
Code:
root@kvm110:~# pveversion
pve-manager/7.1-8/5b267f33 (running kernel: 5.13.19-2-pve)VPS node specs:
Code:
root@kvm110:~# lscpu | egrep 'Model name|Socket|Thread|NUMA|CPU\(s\)'
CPU(s): 128
On-line CPU(s) list: 0-127
Thread(s) per core: 2
Socket(s): 2
NUMA node(s): 2
Model name: AMD EPYC 7452 32-Core Processor
NUMA node0 CPU(s): 0-31,64-95
NUMA node1 CPU(s): 32-63,96-127
root@kvm110:~#
Last edited: