Proxmox numa Memory hotplug is available since Proxmox VE 3. Not sure what the last line means in the NUMA I've noticed that by default NUMA is disabled in the advanced section of CPU when creating VMs but noted an increase in performance when increasing sockets from 1 > 2 Best Practice for NUMA? I have a few dual socket servers and want to know how best to configure VMs. 1. A clear and concise description of what the problem is. Hi everyone, I have a host with 2 sockets (8 pcores/each, 16 cores/each with HT) with Proxmox 5. Is a dual socket xeon Is there any reason when numa would not be enabled on Proxmox. Are you running kernel 6. 3 148374 set_numa_affinity I am evaluating Proxmox (first time) on EPYC, and trying to understand VM pinning and NUMA topics. We never released you're gonna be dealing with NUMA (non-uniform memory access) (numactl) and cpu pinning etc. Counter measures tested: 1) No improvement even after configuring multiqueue, I have configured multiqueue (=8) in Proxmox VM Network device settings. Otherwise use ESXI or anything that supports Numa. Proxmox Numa Support is just helpfull in Proxmox Virtual Environment (VE) is a powerful open-source virtualization platform used to manage virtual machines (VMs). Should VMs always have NUMA enabled and have CPU sockets set to Hi, Recent updates have made ceph started to act very weird: we keep loosing one OSD with following from syslog: 2020-10-17 04:28:21. 4-6 with HT, 12 cores, 24 threads max, it has a NUMA enabled BIOS. loading up guest cores 0-7 (which are mapped to node0) results in utilising host cores Is it possible to enable NUMA from my packer config file for Proxmox templates creation? I don’t find an option in the documentation , maybe there’re some “non-documented” Am I missing something on how NUMA works with proxmox? Currently I feel like I need to disable numa feature in proxmox, set affinity in proxmox, then make a static hook Hi,We have a dual socket Xeon E5-2620v2 based server running proxmox 3. They showed me where I can temporarely add "numa=1" as default setting In the output, we have 4 nodes with 128Gb for each node, and node has 112 HugePages (112 * 1024 = 114688 MB) How to configure at https://pve. Red Hat Enable NUMA If the host hardware is in a NUMA configuration, enabling this setting will ensure Proxmox will arrange resources so that virtual machines use cores and EXPECTED RESULTS VM is created with enabled numa with argument: numa_enabled=1 ACTUAL RESULTS Its not possible to enable numa, there is only numa Yes - I meant allocating cpu to the VMs The servers we've used for Proxomox have 2 sockets with 12 threads each. 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 Proxmox 7 was problem-free with numa enabled on the same host. 922478 Hi guys, I’m still pretty new to proxmox (i only installed it once at work and everything seemed to work pretty much out of the box), so i might still do Hi, I have a host with 4 x 6 core processors and around 125GB RAM. 2. NUMA can boost VM perf 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 This technote describes how to optimize storage I/O latency in performance-critical virtual environments consisting of KVM, QEMU, and Proxmox. I want USB disk drive hotplug question I'm new to Proxmox VE after migrating from VMware ESXi, I'm running PVE 8. Assuming I would like to pin my VM to the 2nd CCX I can simply set the affinity to Hi! Ive got a problem. 5TB of ram. I have a 7 node cluster with roughly 600 CentOS7 VM's running on it. Eg. 8. I've done this by QEMU alone, but now I feel like to use This is a dual socket AMD EPYC system, NUMA is enabled but only for the single VPS I am testing with as I did not set it before Is your feature request related to a problem? Please describe. 1 with 14GB memory and 6 Hey all. I'm always frustrated when <> Memory binding by So my host hast a 32 core Epyc CPU. It's even worse on Linux, which is weird. When making sure that NUMA was enabled I noticed this in my The NUMA flag makes the VM aware of NUMA architecture. To enable memory hotplug you need to enable both NUMA (web UI: VM -> Hardware -> CPU) and Memory hotplug (web UI: VM -> Options -> Hotplug). 4. When I try to resume, it errors with "TASK ERROR: NUMA needs to be enabled for memory hotplug" I cannot enable NUMA, since the Hello, I have created a new server cluster with PVE 7. Holding off on migrating any hosts to v8 for now, some guests require larger amounts of RAM and numa. 4, there is this 'Enable numa' checkbox. 04 image and one difference I noticed is one kernel parameter We just added extra Processor in each Server. So Hi, I am having quite slow performance on both Windows and Linux VMs. I have "NUMA" Hello Guys, can somebody clear up things a little about the best setting of core/sockets with numa enabled? The manuals says you should enable numa and set the I am seeing a guest core able to execute outside its numa node. When I try to check the numastat I get command not found, I contacted Proxmox and it turns out that the worker VM should have enabled "numa" for the cpu. This VM has 12GB of RAM and the hotplug(on Options) was Hello everyone! Colleagues, tell me what the line from the documentation means: "If the NUMA option is used, it is recommended to set the number of sockets to the number of 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 However maybe I am misunderstanding how the numa configuration works, but my goal was assign cores 0,2,4,6 (the 4 real non-hyperthreaded cores) from my 0-7 cores to New Proxmox (I think 7. This video breaks down the steps to configure NUMA for seamless memory upgrades in Learn when to enable or disable NUMA (Non-uniform memory access) for Virtual Machine in Proxmox VE (PVE), a virtualization platform. 3-3). 13 installed. The performance is comparable than what it was on my Non-Uniform Memory Access oder kurz NUMA ist eine Computer- Arbeitsspeicher -Architektur für Multiprozessorsysteme, bei denen jeder Prozessor einen eigenen, „lokalen“ Arbeitsspeicher Manage CPU and memory resources on running virtual machines inside Proxmox appliance. proxmox. They showed me where I can temporarely add "numa=1" as default setting Enabled NUMA, assigned ~3-6 cores per "socket" (most VM's are kept at a single socket, a few I have given 2-3 sockets for 8-12+ cores for more intensive workloads). To make This blog will explore several tips and best practices to optimize Windows VM performance on Proxmox, helping you get the While Proxmox certainly defines the virtual topology presented (numa: 1), my understanding is that numactl is the standard tool used within a Linux guest to control how the Hi, Since 3. com/wiki/Qemu/KVM_Virtual_Machines we have: >If the NUMA option is used, it is recommended to set the number of sockets to the number of nodes Optimizing Proxmox Performance - Advanced Tuning Techniques By Bennet Gallein, Published on November 23rd 2024 | 4 mins, 642 words Best regards Cesar ----- Original Message ----- From: "Alexandre DERUMIER" < aderumier at odiso. For linux and xBSD there is no performance The answer with most of these things - It depends! At a high level in most situations, you want to ensure that the following things are all on the same NUMA Node on a single Hey guys we just went live at a customer with our biggest server yet. I think i know how to do The idea that Proxmox is only reliable if you buy from a partner is a bit dismissive, lots of people run perfectly stable deployments on broadly available hardware. I believe we are running into some odd performance issues due to . Hey Ya'll I'm spotting a lot of NUMA errors on a windows server 2012 (in KVM as QCOW2 on PVE). . com > To: "Dietmar Maurer" < dietmar at proxmox. 13) to quincy 17. Non-uniform memory access (NUMA) and CPU pinning (Processor affinity) are technologies that try to avoid the bottleneck Is NUMA only supposed to be selected if you want Proxmox fully manage the sockets/cores? but if you want to overwrite this by specifying which cores I want, then select sockets: 1 only and We would like to show you a description here but the site won’t allow us. 2 version which Table of Contents Intro KSM KSM in action Tuning KSM in PVE Tuning Other values explained Monitoring KSM status Disable KSM Enable KSM References 1 Intro 1. We have few VMs on it. DL 560 with 4 sockets and 1. You can also run a non NUMA VM on a NUMA Node, if you use only the memory and cores of one Node. Learn why enabling NUMA is crucial for memory hotplug in Proxmox to optimize performance and scalability. 1 Hi, Sorry for this dumb question, but I feel a bit confused. After moving to the 6. I'd also like the flexibility to spin up multiple VMs with 2 Hi all, There is an option to select NUMA when you configure a VM's CPU. Is migrating machines from the dual socket machines > single socket with NUMA enabled have any negative effects? Proxmox VE emulates by default a LSI 53C895A controller. I Hi, sounds like it could be the issue discussed in [1], I'm still looking into that issue. This video breaks down the steps to configure NUMA for seamless memory upgrades in your Hi, I was looking at the docs about enabling NUMA because I have dual Xeon E5-2650 v2 processors on a dell R720 server. I have a KVM guest which worked fine with NUMA enabled and 2 sockets ans 8 cores and around Proxmox VM Autoscale is a dynamic scaling service that automatically adjusts virtual machine (VM) resources (CPU cores and RAM) on your List of additional CPU flags separated by ;. The NUMA option can be found under - Selection from Hello, i have a 3CX(latest version which is a debian based) on prem installation running on Proxmox 8. 7. If the kernel 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 Since I don't use unRAID I cannot fully confirm that. 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 Proxmox Virtual Environment (Proxmox VE) is a powerful open-source virtualization platform based on KVM (Kernel-based Virtual Machine) and LXC (Linux Proxmox Subscriber Apr 22, 2009 5,977 199 163 Ahrensburg; Germany Feb 25, 2016 #2 Hi, do you have 2 CPUs in the first node? NUMA make only sense with mutible CPUs Using the numa options is not really "CPU pinning" in the traditional sense, it just means that the cores specified will be migrated only to physical CPUs in on specific NUMA VM 1 (which runs on numa 0) acts as expected and starts within seconds, VM 2 (which runs on numa 1) takes much longer but starts eventually, however 1500MB more The server I am testing with has: Intel Xeon E3-1246 v3 @ 3. See host requirements, VM Learn why enabling NUMA is crucial for memory hotplug in Proxmox to optimize performance and scalability. 4-3. 3 , enterprise repo. I contacted Proxmox and it turns out that the worker VM should have enabled "numa" for the cpu. 2-1-pve-signed are available and the default. To enable memory hotplug you need to enable both NUMA (web UI: VM -> Hardware -> CPU) and Memory hotplug (web UI: VM -> If Proxmox could assign dynamically the Cores of one VM to run them on the same Numa-Node, i would definitively go with 8 Numa-Nodes, for even more performance. I am a bit confused as to what implications enabling this has? Does it mean 'this host system is numa, therefore make use of Enabling NUMA and setting the number of virtual sockets to the same number as the NUMA domains (usually the physical sockets) makes Proxmox allocate the memory for the I have a system with Supermicro H12DSi-N6 with 2x EPYC 7642 once the system starts going above 30% CPU usage in the overall 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 As far as I understand, when using multiprocessor boards based on Proxmox, you need to use NUMA in virtual machines. 1 The success or failure of huge page allocation depends on the amount of physically contiguous memory that is present in system at the time of the allocation attempt. numactl is not even installed. My understanding is that there are different recommendations (by If you want to use Proxmox, try to avoid Numa or/and Multisocket Systems. VirtManager, which is a de-facto standard for running VMs on a desktop Re: Hyper-Threading vs No Hyper-Threading; Fixed vs Variable Memory Your assumptions is only valid for virtualized windows. 2 and does your machine have multiple NUMA nodes? Could you Hi, Ceph pacific (16. System is running Debian 11. Anyone knows what is the BEST way possible to setup windows 11 in terms of performance (to host game servers) ? I'll I use Proxmox extensively in my homelab where I have virtual machines for many of my clients (I'm a freelance Postgres DBA and need to keep development / scratch machines Enabling NUMA awareness in Proxmox didn’t have a major impact on performance. When I have enabled hotplug, enabled NUMA, ballooning enabled and Memory and Minimum memory set to same Has anyone successfully gotten proxmox 8. So, I have So, when I disable numa, or reduce sockets to 1 - virtual machine starts. Hi, any idea why out of all my servers, the only one actually with NUMA (2 physical cpus). On the working server I have some virtual ceph cluster, where numa is not present, I have exactly same warning message , and ceph osd numa-status is also empty, and everything is working fine. As far as I understood all Zen2 like CPU's are NUMA based, so in case of AMD Ryzen, Epyc, etc, they all have "numa I have a NUMA system with two Xeon E5-2680 v3's. 3+?) now contains a convenient shortcut to "taskset" to set CPU affinity. Installing proxmox is brand new. 17. But I tic’d the NUMA box on the processors config anyway just in case And NUMA seems to work pretty well. Greetings, I decided to do some UMA and NUMA testing to optimize my VM performance. When Windows 2008r2 Guest (2 sockets*12cores) has started, "numastat" shows, that numa_miss and numa_foreign got zero I have had some more time looking in to this, and it is not visible in dmesg on a Ubuntu 20. I have Question about NUMA nodes and core pinning I have a host with two NUMA nodes, and I would like to create a VM with two NUMA nodes, with the cores from each VM node Hello, whats the reason for setting NUMA=1 in a vm, that is running on a single socket system? I have seen that on a 3 node ceph meshed setup, any reason why numa = 1 The NUMA checkbox in Proxmox will result in better performance due to local memory placement in multiprocessor systems Here is an article that tried to explain what To avoid NUMA migration and improve VM performance, CPU affinity can be used to bind the VM to specific cores and NUMA nodes. Learn how to optimize VM performance in Proxmox using Pop!_OS. Ex. TL;DR: How does Proxmox and the virtual machine High I've got a proxmox host up and running as my main machine at home. current proxmox supports CPU pinning but not numactl socket pinning the Hello, I'm experiencing many NUMA misses on a few of our Proxmox servers and reading the documentation[0] this might be resolved by enabling NUMA emulation for the VMs ankur. Each Processor has 32 GB of RAM memory. socket semantic is there for NUMA systems to allow more efficient usage of multi CPU-socket systems and or may be required by some (often licensing) software Enabled NUMA flag (no noticeable performance boost) Proxmox Virtual Machine Hardware Settings - Network Adapters: Disable With numa: 1 and if the guest OS can take advantage of the NUMA topology for memory placement, I would expect that the automatic NUMA balancer on the host would not Blank lines in the file are ignored, and lines starting with a # character are treated as comments and are also ignored. Are there any recommendations for enabling NUMA in Were the numa 0 and 1 related to the socket number on the motherboard? My X10DRG-HT has socket 1 and 2, i assumed 1=0 and 2=1? Also, are you adding this to the VM conf as you have I've got a VM that is suspended to disk. Its not exactly scientific because the "load" is Plex, forced to transcode high The core vs. Learn how to enable NUMA (non-uniform memory access) and CPU pinning (processor affinity) for better VM performance on multi-socket computers. There is a special nested-virt shorthand which controls nested virtualization for the What is NUMA in proxmox? From Proxmox VE. My current setup is as followed: 256 core EPYC Milan 512GB memory I have this split into three Vms (windows Kernel Samepage Merging (KSM) is an optional memory deduplication feature offered by the Linux kernel, which is enabled by default in Proxmox VE. I also use it as my desktop by passing through a GPU to windows 10 pro. 086 7fae4e99f700 -1 osd. However I have installed Proxmox 6. 50GHz (8 Cores, 1 Socket) 32GB RAM 2x 2TB HDD (in RAID1, so 2TB usuable space) With memory hotplugging The NUMA Miss value was zero for all of my VM’s so, it looks like proxmox has been handling a lot of this by itself. It means that QEMU is running with the support of the I have a host with two NUMA nodes, and I would like to create a VM with two NUMA nodes, with the cores from each VM node pinned to cores on the corresponding host node. Then you can use the VMs memory options in the web UI as usual. A more helpful This allows it to take NUMA locality into account while coalescing pages, thus preventing performance drops related to pages being moved to a remote node. While I know the basic NUMA concepts, I don't really understand what this checkbox does. Typically average anywere from 150-500G in KSM memory sharing. A SCSI controller of type VirtIO SCSI is the recommended setting if you aim for 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. I have three simple nodes with four NIC's, 1x1Gbps for try to disable HA on the vm first, then start it again, maybe you'll have more information. com > Cc: < pve-devel at VyOS - Proxmox vm maximum router throughput - Which is faster ( 1-Socket & 12 Cores ) or ( 2-Sockets & 6 Cores ) -or- ( 4 Sockets & 3 Cores ) ? I am running some VyOS 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" Proxmox VE (QEMU) doesn’t expose per-vCPU pinning in the VM config, so you can’t directly “tie” guest vNUMA 0 to a subset of host CPUs and guest vNUMA 1 to another 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. If your system has a NUMA architecture [if the command numactl --hardware | grep available returns more than one node, then your host system has a I have a cluster mixed of single and dual socket machines. KSM works by scanning a range of Ok. 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 Hi, I've used Proxmox for many years but recently decided to setup a lab env with three nodes to test out using ceph. When i activate NUMA option, and check the opctions for hot swap memory and CPU, the VM (linux vm in this case) doesnt recognize the memory (only Hi Currently i am creating a new VM with windows 11. if you have enable NUMA + memory hotplug, the memory size should be a Question about NUMA nodes and core pinning I have a host with two NUMA nodes, and I would like to create a VM with two NUMA nodes, with the cores from each VM You may sometimes encounter the term KVM (Kernel-based Virtual Machine). 6 in monitor, Hi, I have a problem with ubuntu-cloud template in proxmox. But I can't start the virtual machine up with the error: TASK ERROR: NUMA needs Configuring VMs with hotplug For CPU and memory hotplug, we also have to make sure that the NUMA option is enabled for the VM. Proxmox machine all full Hello Proxmox Community, I am currently managing a Proxmox cluster with three nodes and approximately 120 hosts. I'd like to know if we should NUMA nodes - should I enable them if system do support NUMA but VMs are small? 2xXeon E5-2680 v4 CPUs, 224 Gb RAM (7 out of 8 slots filled, remaining one will be filled when 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. I will be creating two Gaming Windows VMs with Proxmox 1)First Stept is to set the Cpu Emulation type to Epyc. I am planning to set up Ceph for storage and would like to This immediately solved the issues and the Windows2019 VMs run smoothly now within the Promox 8 environment, but using kernel 5. Use +FLAG to enable, -FLAG to disable a flag. x Hi everyone, I'm trying to emulate a memory expander device by creating a NUMA node without CPU. When I run kvm process from command line with enabled numa and 2 cores - virtual machine starts. For eg. 15 instead of the new 6. Errors are like such: PerfOS: 2017: Unable to collect NUMA physical Hello I have an odd issue that started after my server crashed. I can't be We would like to show you a description here but the site won’t allow us. However, ensuring that VMs were allocated CPU Hello, i am trying to pin cpus to a numa node but find it difficult to understand why it is not working, i have the impression it is a bug, maybe someone can enlighten me with the For Sockets, if your machine supports NUMA, set this to the same number of sockets as your machine and check the Enable NUMA I am using an Epyc 9654 CPU, and in bios have set NUMA nodes per socket to NPS4 and enabled ACPI SRAT L3 Cache as NUMA Domain, yielding 12 NUMA nodes. Intel Xeon E5-2620 Now each server has 2 of these with 64GB memory. Improve CPU, memory, and disk I/O with easy-to-follow tweaks This worked fine, and the number then calculated by proxmox and set as new value made it possible to boot VM directly into 1TB Yes, it's getting rolled out: What do you mean here? The EFI signed kernel variants like proxmox-kernel-6. 6 During the quincy upgrade process from ceph pacific, we could not upgrade our osd disks while we were upgrading 17. 2) My BIOS is in Hello, I`m very confused with NUMA, as I read from docs you have a NUMA capable host if you have multiple CPUs (sockets). kumar Thread May 5, 2024 core cpu limit hotplug hotplug cpu limit numa vcpu Replies: 3 Forum: Proxmox VE: Installation and configuration M Hi, Installed successfully Windows 11 official iso under proxmox but i am facing huge CPU usage. I did clean install of Pve 7. 5 (Proxmox VE 7. wemkabcvhkxgtfrmlllizgzzgmlqwgtjpuuqvxkpdilveqhurbsrlaxvuffsyavuhaiqszlrnmhjw