Proxmox numa. Can be the NUMA on setup that slow .

Proxmox numa I run Linux VMs To manage large amounts of RAM, they use Non-Uniform Memory Access (NUMA). The settings that made it work for me had to be added as args: args: -chardev socket,id=char0 After reading countless discussions, articles, whitepapers and not finding suitable answer, I decided to take matter in hand and do some testing to come to conclusion, if i should be using Hyper-Threading or not. Note that one needs to differentiate between NUMA emulation for VMs [1], which is enabled on a per-VM basis (the "Enable NUMA" checkbox in the GUI), and the NUMA balancer, which is a kernel task running on the host [2] and had a power outage proxmox is up and running however i have 1 alpine VM that doesnt get any IP when i try to access the console i'm getting the following pveversion -v proxmox-ve: 8. 4-3. Since I’m not familiar with the details, I can’t implement these options. DL 560 with 4 sockets and 1. 3 VMs randomly freezes and stop responding. When I mean we still don't even have Numa Support, which makes Proxmox mostly useless on Dual-Socket or Newer Single-Socket AMD Plattforms like Genoa compared to other Hypervisors. The closest I have gotten to finding the cause of the problem is this post in the lxc forum. I believe we are running into some odd performance issues due to the way the memory is being spread out over the numa nodes. Use with caution! Click to expand more details available in the proxmox NUMA static configuration support I am struggling to fully understand everything about NUMA, however I feel like I've got a decent understanding of how proxmox is handling it, as I've run many configuration tests over the Hi, Expert Would it possible to give a passthroughed PCI device a numa mark. Here is the config of the Hey guys we just went live at a customer with our biggest server yet. But I have not been able to 我有一个NUMA系统与两个Xeon E5-2680 v3's。系统运行Debian 11. As the following shows: After PCI devices passthrough, I got: But I would like to have a NUMA mask as metal machine: Since this go deep in Linux drive system, I don't know wheth is it possible? Could you please This blog will explore several tips and best practices to optimize Windows VM performance on Proxmox, helping you get the most out of your virtualized environment. 1 and kernel 6. Similar configuration with SAS RAID 10 with 8 hard disk and embedded raid controller result esspecialy for write is much better In the context of Proxmox VE Qemu and KVM can be used interchangeably, as Qemu in Proxmox VE will always try to load the KVM module. I switch off the NUMA on 2 VPS, yet is: 1,75GB used in Proxmox 1,15GB used in aaPanel On all 2 VPS. While trying to find this answer, i Hi guys, I want vm1 to run on cpu1, and vm2 to run on cpu0, due to a graphics card configuration (they are not reversible). Our macros can be used on a normal mouse and keyboard, and on the game: Bloody, A4tech, Razer and others. . 04 VM. Installing proxmox is brand new. 4 cores each and only enable NUMA on these and leave the rest for dynamic sharing? Regards, Afox dietmar Proxmox Staff Member Staff member Apr 28 In the last couple of days I got increasingly pissed off at how much manual maintenance work I had to do every time something changed in my setup. My understanding is that there are different recommendations (by AMD etc. If you have problem combining ram maybe: 1. 3-3)。在确保启用NUMA时，我在我的dmesg中注意到了这一点：root@(host):~# dmesg | grep -i numa[ 0. 5 (Proxmox VE 7. Since it's my first time using Proxmox I tried configuring and looking around on how to properly optimize VMs, then set up a Win 2022 Server and gave it 64 One thing which you must check is your NUMA set, the EPYC's are much more split then our Intel Servers and you want to make sure, that the the OSD's and the NIC's can run on the same numa node. 3. Do you have a use-case for a custom NUMA Hi! I have AMD EPYC 7401P platform /4 NUMA nodes/. We have few VMs on it. However Hi, When starting VM error: qm start 100 kvm: -numa node,nodeid=1,cpus=1,memdev=ram-node1: CPU index (1) should be smaller than maxcpus (1) start failed: QEMU exited with code 1 How can this problem be solved? How to assign the necessary cores to VM? configuration VM: balloon: 0 Hi, you have no benefit with one cpu only. 12-8-pve I've just finished getting hotplug RAM and CPU to work on PVE 3. So I wonder how to resolve that problem. Optimizing Proxmox Performance: Tips and Tricks for 2025 Welcome, fellow tech enthusiasts! Today, we're diving deep into the world of Proxmox, specifically focusing on how to optimize its performance. I have attempted all the fixes that are out there, installed intel microcode, validated that VMware tools are In the proxmox vps summary I see that the ram is completely used also if the vps is quite without any connection or active job. AMD 7745hx with iGPU 610M PCI passthrough don't crash my host or VM, but I still don't get any gpu in windows 10. g. AMD drivers down't detect it. -13. Apparently if loaded more, the often it happens, but always just a short moments, usually a second or less, sometimes up to 2 seconds, but not more. Eine Idee wäre in der OVS-Konfiguration beim Start auf die physikalische Netzwerkkarte zu verweisen, hier "/sys/class/net/ens3 Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. 0 to run on a dell R730 in UEFI boot? I got a new to me dell R730 with two E5-2667 v4's in it and am trying to install proxmox. I am running PVE 8. 00GB Total memory for the VM, regardless of the amount actually assigned. Core - is the physical core a CPU has. I just got everything for my GPU VM with the GPU connected to CPU 1 and the VM only using CPU 1. 3-3). $ sudo qm config 200 agent: 1 boot: order=scsi0;net0 cores: 4 cpu: x86-64-v2-AES ide2: none 詳細の表示を試みましたが、サイトのオーナーによって制限されているため表示できません。 Hi, I tried with ZFS raid10 with 12 NVMe Samsung 2TB -> ashift set to 13 compression lz4. And NUMA seems to work pretty well. Was hard to detect damaged ram. For eg. Vm host: w2019 standard with Virtio SCSI controller, and results are poor. Its not exactly scientific because the "load" is Plex, forced to transcode high definition video. I have searched everywhere to find a good guide to Memory hotplug is available since Proxmox VE 3. We think our community is one of the best thanks to people like you! NUMA Topology Start by evaluating the system’s NUMA topology. Otherwise you might A Hey everyone, I'm having an issue with hotplugging CPUs in Proxmox. cloud collection:community. After the recent pve-manager update I am unable to get any video output in new OVMF VMs. It is a RDP server So far so good. Intel Xeon E5-2620 Now each server has 2 of these with 64GB memory. The 2700X is an 8 core/16 thread CPU. Proxmox VE Administration Guide vii 3. This node will not start a VM unless the processor type is set to max or to host. Distinguished Member Proxmox Subscriber Aug 2, 2021 5,115 213 Hi all, I have a strange issue with a Windows Server 2022 VM: every few seconds the whole system gets stuck for a second or so. I imagine the best way Hello, I recently installed the new Proxmox 6 on one of my servers with the intention to move an old physical windows server to virtualization. All VMs use less than 64 Gb of RAM. Kann mir bitte jemand sagen was ich Heya! Long story short I'm currently looking into Proxmox since ESXi has some pretty weird crash-happy issues with one of my eSATA cards. 1 with 14GB memory and 6 cores and selected 2 Sockets(which we assume is now using both processors as it now states 12 cores are being used. Hi, I am noob in the Proxmox. 1. 7 This issue/PR affects Ansible v2. Falk R. Here's what's happening: Set a limit of 6 vCPUs. I can get through the installer in BIOS mode but it Not always my PC was filled all 4 slots of ram and I never had any problem with ram. But I can't start the virtual machine up with the error: TASK ERROR: NUMA needs to be enabled for memory hotplug If I enable numa then I can start the virtual machine. NUMA can boost VM perf I was looking at the docs about enabling NUMA because I have dual Xeon E5-2650 v2 processors on a dell R720 server. BTW: While suspended no backups were made. A Proxmox VE cluster cannot share the exact same storage with another cluster, as storage locking doesn’t work over the cluster boundary. 7 Override the Kernel Anyone else having trouble with VMs not automatically starting on host reboots, when relying on CephFS for cloud-config snippet storage? TASK ERROR: can't 2020-08-07 12:53:50. But i think we can agree, that 8 Numa nodes is a ton and 8 threads per Node is maybe a bit few. VMs use CPU type = host with numa activated as well I have Proxmox 8. I also use it as my desktop by passing through a GPU to windows 10 pro. So with bypass all I get is a Ok. My question is this? The gpu Hello, I have created a new server cluster with PVE 7. To enable memory hotplug you need to enable both NUMA (web UI: VM -> Hardware -> CPU) and Memory hotplug (web My current all have NUMA enabled in proxmox. These of course can cause issues if the VM You can disable Numa, you can Split the CPU to 2/4 Numa Nodes or you can even do one Numa-Node per L3 Cacle, which will lead to 8 Numa-Nodes for my 9374F. I have another thread here about that, people simply don't have clue about numa on this forums, they just think that enabling numa in vm settings changes something. It was a rough trip, but now Linux starts counting with zero, so it should always be 0-x. 753 7f7ed74aa4c0 0 set uid:gid to Yes, WSL is installed properly and I have enabled those components. When Memory hotplug is available since Proxmox VE 3. This would add support for just enabling/disabling NUMA. Still not 100% but more better. numa is 1, to tell the VM that we have numa capabilities. Only what we see is at windows I just checked our code and it might be a bug on our side, I'm investigating. 086 7fae4e99f700 -1 osd. general collection Related to Ansible Collections work module This issue/PR relates to a module. It’s suggested that you create a new Has anyone successfully gotten proxmox 8. When making sure that NUMA was enabled I noticed this in my dmesg: root@(host):~# dmesg | grep -i numa [ 0. One of the ram is damaged 2. 012447 29 votes, 15 comments. 6 Editing the Kernel Commandline. Fine-Tuning CPU and NUMA I have 7 nodes in my cluster and 6 of them are running older Intel CPUs, with each node having 2 sockets. Everything was High I've got a proxmox host up and running as my main machine at home. 04) sees the allocated amount of RAM, the VM Summary tab in the Proxmox web GUI always shows 1. It matters if, for instance, you need NUMA (allocated RAM per CPU, which speeds up computation). 3 148374 set_numa_affinity unable to identify public interface 'bond2' numa node: (2) No such file or directory Sep 20 08:39:31 pve3 ceph-osd[195291] Hi, Weird behavior for a Ubuntu Server 24. I think this may be in part due to how I have the VMs configured. Hey everyone, I'm having an issue with hotplugging CPUs in Proxmox. This VM has 12GB of RAM and the hotplug(on Options) was enabled for Memory and CPU and thus NUMA was needed to be enabled at CPU config so that the machine could run. In total in base 0 macro try to disable HA on the vm first, then start it again, maybe you'll have more information. vm. Is a dual socket xeon system and even though it has 2 16core CPU's, on my main desktop i passthrough 12 from each socket. Nothing is responsible and after this time everything is going back to normal. Hallo, Bei meinen Migrationstest ist mir aufgefallen das zwei Systeme in unserem Testcluster plötzlich diese meldung bringen: "TASK ERROR: host NUMA node1 doesn't exist" Wenn ich NUMA abschalte geht es. 1. Pretty disappointing, this is what the bare metal results for the host's CPU should be near for Single Thread score: CPU Test Suite Average Results for Download free ready-made macros for «proxmox numa or not». Can Thx for the tip. If you're running a 551 Or would it be better to chose for example two "important" VMs with e. With 6. For the time being, try your original config but disable memory hotplug, that works on my end. See host requirements, VM As far as I know, virtualized cores 1x2 or 2x1 processor does not matter, as long as they do not have more cores than the physical cpu and numa enabled. conf balloon: 0 bios: ovmf boot: dcn bootdisk: virtio0 cores: 8 cpu: host efidisk0: System-Drives2:vm-110-disk-0,size=4M Proxmox doesn't support numa or it's completely broken with amd CPUs, as long that is the case, you cannot get 100% of the performance in any multi threading application. But if one server has two cpus its make sense to enable numa on the 1-cpu server too - if you use live migration the right setting for the VM is still set. NUMA improves memory access speed by splitting memory into different nodes, where each node has its own memory and CPU cores. NUMA and Its Significance Non-Uniform Memory Access (NUMA) architecture plays a crucial role in modern computing environments, particularly in systems with multiple processors or cores. numa0 says that VM has numa node 0 with 16 cores, binded to host numa node 0, memory 114688 MB allocated DO I need to enable numa on VM with 2 logical cores setup with Hyper-threading ? I understand I need it with more than 2 cores for obvious reasons but I though I read somwhere that if there are only 2 cores and it is a CPU with Hyper-threading (in my case Xeon v4 family) I don't have to. 89 3. 4. It is important to constrain performance critical workloads to a single NUMA node to minimize memory latency. Last edited: Jan 16, 2024 fweber Proxmox Staff Member In Windows 2022 template we have CPU/Memory hotplug enabled with NUMA to support it on the processor - Recently all 2022 have been getting BSOD with an I tried and still same results - here are the configurations Hi, I'm using an AMD EPYC 7551p CPU with 4 physical dies and 8 cores per physical die (32 cores and 64 threads) and 8 DDR4 ECC RAM modules with 16GB each (128GB). As mentioned above, make sure you do not enable numa in proxmox. I'm quite impressed with the performance so far, although it's nowhere near what it manages natively. Can be the NUMA on setup that slow. 1 and see if I can test out this new kernel. Then you can use the Learn why enabling NUMA is crucial for memory hotplug in Proxmox to optimize performance and scalability. Udo Hi,We have a dual socket Xeon E5-2620v2 based server running proxmox 3. Let We just added extra Processor in each Server. Das Problem kam durch ein Update, ging vorher definitiv. To enable memory hotplug you need to enable both NUMA (web UI: VM -> Hardware -> CPU) and Memory hotplug (web UI: VM -> Options -> Hotplug). Only 2 VMs are using more than 32 Gb of RAM. Windows server migration went all smooth but I'm experiencing the following problem: Whenever I try to start the Solidworks license server I get an For Sockets, if your machine supports NUMA, set this to the same number of sockets as your machine and check the Enable NUMA box. This means that the memory of such nodes will be usable only for movable allocations which rules out almost all kernel allocations. But I can't say the same for the CPU. Here is how the host looks node 0 free: 2387 MB Proxmox 7 was problem-free with numa enabled on the same host. affects_2. In the context of Proxmox VE QEMU and KVM can be used interchangeably, as QEMU in Proxmox VE will always try to load the KVM module. So I got around and built a python NUMA nodes to be movable. I could remove and reinstall them as a long shot, which I will do, but I'm confused as to why this didn't work out of the box! CPU(s) 32 x Intel(R) Xeon I'm running Proxmox on a Threadripper 3970x and plan to create a VM with a large number of cores for ML/AI tasks using 4-6 GPUs. 2 ram sticks could work separately Hello everyone, I have a very irritating issue happening on my windows VM that was recently migrated from vSphere. To make it easier to understand, let's use the AMD Zen 4 architecture (EPYC 9004) as an No, the Proxmox builder doesn’t have a NUMA option yet. Here it gets a bit confusing - within Proxmox the number of cores equals the number of Hallo zusammen Meine Proxmox Installation hat sich heute Neu gestartet und jetzt zeigt mir die VM vom IOBroker diesen Fehler an "NUMA needs to be enabled for memory hotplug", die andere VM läuft. I'd like to know if we should enable NUMA for each of our guest VMs (three W2012R2s running SQL Server 2008/AD controller/IIS Server) as well? Will it improve Hello, i have a 3CX(latest version which is a debian based) on prem installation running on Proxmox 8. ) depending on VM use. 5. if you have enable NUMA + memory hotplug, the memory size should be a multiple of 1024 too. 012447] NUMA: Initialized The Issue When should we enable NUMA for VM on PVE? When should we disable NUMA for VM on PVE? The Answer Enabling NUMA is required for hot-pluggable CPU and Memory feature [1] Enabling NUMA can boost VM performance [1,3] Though, most of the time, if we only have a single CPU and we don’t [] Hello, i was debugging ceph and saw this in syslog Sep 20 08:39:31 pve3 ceph-osd[195290]: 2019-09-20 08:39:31. (As a general rule, if you have a multi-socket system, you can turn on NUMA in the BIOS 1 Numa, is just a logical group of memory/cpu, to tell to the os: this cpu have direct access to this memory, and the os will try to schedule process on the cpu with direct memory Learn when to enable or disable NUMA (Non-uniform memory access) for Virtual Machine in Proxmox VE (PVE), a virtualization platform. 13. proxmox-ve: 4. It seems that the problem is gone. 13-1-pve with the scheduler patch [1] did not seem to fix the freezes reported in this thread, we decided to revert [2] the scheduler patch in proxmox-kernel-6. QEMU inside Proxmox VE runs as a root process, since this is required to access block and PCI devices. My CPU is 4x4 multi-chip affinity is 0-7,32-39 to bind the VM to the NUMA node 0. 5 kernel after 2 or 3 hours i had to disable NUMA. VNCProxy appears to run successfully, but the only output is a black screen that says "Guest has not initialized the display I am putting together a new server today and will install 8. 5TB of ram. Understanding NUMA can greatly enhance your server's performance and resource allocation efficiency. While the guest OS (Ubuntu Server 14. 2-58 (running my host machine only have one numa node。I want‘s test numa。can I simulate numa vm’ With that done, you can edit your VM to add the virtio-fs volume. the vms are used for gaming so it is important that the vms run on the correct node with the gpu. 7 bot_closed bug This issue/PR relates to a bug. If Hello everyone, I have a problem with two virtualized servers with Proxmox and I am relatively new to working with this system, the Windows Server 2022 virtual machine freezes for a while and then works again, if anyone has any reference to the problem I would greatly appreciate it, the Proxmox Greetings, I decided to do some UMA and NUMA testing to optimize my VM performance. From time to time we are facing strange issue that one of the machines freezing for some time like 10 to 30 seconds. Whether that's a new disk added, or changing a VM name, or swapping a passthrough NIC to a virtio device, etc. (As a general rule, if you have a multi-socket system, you can turn on NUMA in the BIOS) Otherwise set Sockets to 1 . They just cant work together I had played with memtest on one pc. Holding off on migrating any hosts to v8 for now, some guests require larger amounts of RAM and numa. 4 using Numa. In meinem Fall steht in der Datei numa_node eine "1" für beide Karten (1 x Dualportnetzwerkkarte). The problem is the 1 node that I have that is running an AMD CPU. Enabled NUMA and hotplug options in the VM settings. lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Address sizes: 46 bits Hi! I can not manage to get my VM started after setting the numa command in the vm config. If I restart the Vps the used ram is around 30% and is really fast. 4 host with 4 sockets with 16 cores each (AMD Opteron 6282 SE), total 64 cores I created a Windows VM on proxmox and allocate 64 cores to this VM to use all cpus available (only 1 vm per host) when I run a cpu stress test on VM, only 50% of the all cores is at 100% hello We are using proxmox 7 and windows 2019 virtual machines. Proxmox offers quite a lot of tuning options for NUMA ( I am evaluating Proxmox (first time) on EPYC, and trying to understand VM pinning and NUMA topics. 13-2-pve, which is now available in the pvetest repositories. Learn how to enable NUMA (non-uniform memory access) and CPU pinning (processor affinity) for better VM performance on multi-socket computers. Is this best way in terms of performance?. I have a few dual For Sockets, if your machine supports NUMA, set this to the same number of sockets as your machine and check the Enable NUMA box. If you enable this feature, your The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway. 8. Launched a Windows VM with 2 vCPUs. I'd also like the flexibility to spin up multiple VMs with 2-3 GPUs each. System is running Debian 11. When Windows 2008r2 Guest (2 sockets*12cores) has started, "numastat" shows, that numa_miss and numa_foreign got zero. Qemu inside Proxmox VE runs as a root process, since this is required to access block and PCI devices. Plex is installed as Rockstor container, and Rockstor itself is in a Hi New using Proxmox, I have been trying to run OPNsense in a VM, already tried both available bios and machine configuration but the BSD kernel always enters in panic mode. When I try to resume, it errors with "TASK ERROR: NUMA needs to be enabled for memory hotplug" I cannot enable NUMA, since the VM is locked. I want to run all my VM's inside each physical die (and make sure that they use only the RAM modules directly assigned to them) in Based on the above outputs, i give 6 cores and 6 hyperthreads from the CPU in NUMA node 0 the PCIE lanes are routed to in proxmox CPU settings: If you want to try irq affinity, the same cpu pinning using pve-helpers, and including irq affinity would be: I have a NUMA system with two Xeon E5-2680 v3's. I Proxmox offers quite a lot of tuning options for NUMA ( search for “numa[n]” in the admin guide). my question is, how do i Running a WIn10 guest with successful GPU passthrough, performance on that front seems decent. With a windows server 2022 vm and around 60 rdp users no freezes so far. Download speed ~500 kbps While a debian 12 VM is able to download at full speed 1000 Mbps. Hi all, since kernel proxmox-kernel-6. 4-6 with HT, 12 cores, 24 threads max, it has a NUMA enabled BIOS. Furthermore, it may also lead to VMID conflicts. This also Manage CPU and memory resources on running virtual machines inside Proxmox appliance. Then how do I expose host cores 4-7 and 20-23 to the guest as cores 0-7? And how do I make sure all memory allocated to the VM is on the same host NUMA node? Not only do I want this for performance reasons Hi, I have a proxmox 7. Setup Display virtual-machine configuration. This video breaks down the steps to configure NUMA I've got a VM that is suspended to disk. Since we’re dealing with network-attached storage, it Hi all, I have two gaming VMs set up and running on a Ryzen 2700X. On PVE host no bandwidth issue, firewall on (nftables), masquarade, ipv4 forwarding activated. 0 (running kernel: 6. hehokx qspvf ovkead gwqf gjyxl eyxw vfbwp ncoo lbjr dgyy mvnfi xsbaed tkc vshmsx tfnbbf