1. P

    Windows VM's memory management compatibility: Let's make Windows memory management better!

    Hello Proxmox Community, I am addressing a longstanding and widely experienced issue where memory freed by the VirtIO balloon driver in Windows VMs isn't reflected in the Proxmox host's memory usage statistics. Despite successful ballooning shown within the VM, the host reports full RAM...
  2. A

    [SOLVED] Problem ram allocation on VM

    I've all win machine on my istance affected by memory allocation issue. I read a lot of post/page but I can't found a root cause of this issue. This machine is configured with and from console I see this status inside of win machine I can see that all ram it used by Driver Locked (Balloon...
  3. D

    [SOLVED] Truenas vm on proxmox - Middleware Failed to Start - Error

    Hello, Every time i reboot proxmox server i have the same problem with my Truenas VM : Middleware Failed to Start. So i restert Truenas VM many times and somehow it finally starts correctly. Once i saw there was some messages related to lack of RAM while Truenas services were starting. Not...
  4. C

    Anfängerfragen - LVM/ZFS, Template, Balloontreiber, Konsole

    Hallo zusammen :) ich bin noch ganz neu in der Proxmox Welt unterwegs und habe ein paar Fragen und würde mich sehr über euren Rat sowie Erfahrungswerte freuen :) 1. Meine Erste Frage dreht sich um den Storage. Macht es für den Heimanwender einen großen Unterschied ob man ZFS oder LVM-Thin...
  5. L

    [SOLVED] Ballooning memory: How to retrieve the max ram allowed from the guest OS?

    Scenario: Centos Guest OS with 8GB/24GB RAM as min/max allocated. The machine typically uses between 10GB and 12GB of the allowed RAM due to ballooning, but here's a problem: Using free -h shows only 14GB in total available. Can't find anything else that shows the 24GB max allowed. There are...
  6. O

    Wrong memory usage reported in Proxmox interface even with ballooning off?

    Hi all, one of the problems I am trying to get to the bottom to is, Proxmox thinks my OPNsense VM is using 6 gigs of RAM when it's only using 400mb or something? I first simply assumed this would be something to do with ballooning feature, and working as intended if that were desired - but it's...
  7. T

    RAM Ballooning wann sinnvoll ?

    Hallo zusammen, Ich habe ein Proxmox Server, da migriere ich jetzt einige Maschinen von einem anderen Virtualisierer rüber. Im Moment habe ich noch genügend RAM (256GB(. Wenn ich jetzt theoretisch 30 Windows Server VMS habe, und ich bei allen ein Ballooning von min. 4GB und max. 8GB aktiviere...
  8. B

    [SOLVED] Proxmox reporting wrong ram usage

    Hello everyone, I have a problem with my ram usage on Windows server 2019, proxmox reporting the ram usage always over %85 percent and it doesnt report the right value, the vm using less then 2 gb. I have installed all the drivers. Balloning is enabled, Qemu is enabled, I have also tried to...
  9. M


    Good morning, on a node of our cluster with 1TB of RAM occupied at 60% we have a problem with ballooning. Specifically, on a windows server 2019 VM with 128GB of RAM: On the node with Proxmox VE 6.4-13 with Community subscription we see this: $ free total used...
  10. N

    Automatic Memory Ballooning on Windows-Based VMs with QEMU Emulator

    I'm having trouble emulating a Windows VM with memory ballooning on QEMU. My investigation has led to two questions. Just to describe my test setup: I installed virtio ballooning driver and the ballooning service on a windows family OS and then spawned a QEMU process with 8GB RAM with the...
  11. C

    clarification needed about ballooning Wiki page

    The "Dynamic Memory Management" Wiki page states, about ballooning : Does that mean : (a) that the unused memory is given back to the host to be used as it wishes, even for non-Proxmox/KVM related tasks OR (b) that the unused memory is given back to the host, but only to be used by other VMs
  12. B

    LVM-Thin Ballooning not working - High memory Usage

    Hello, I have some problems with my PVE host and mostly with the RAM management. I attach the screen of my host resources: On this host, I installed one(and only one) VM, that it configured as shown in the following image: The Ballooning is corretly enabled, but I don’t understand why the...
  13. P

    Proxmox showing incorrect usage for Ubuntu VM

    I came across this thread: which is the exact same issue I have, however the guy didn't end up replying back. I'm running Ubuntu 20.04.3 with PVE 6.4-4, Ballooning device is enabled in the Memory Settings: Doing info...
  14. E

    Windows server 2016 memory usage display

    Hello! I have a windows server 2016 vm in proxmox, with 16gb of memory, installed the ballooning service which is running, but the used memory displayed by proxmox is very high (about 12gb), but in the task manager the used memory is only 3gb. Nothing happens if I stop or restart the ballooning...
  15. J

    High memory usage without any VM's Running

    Hello there! Recent changes: i have recently migrated my boot device on my proxmox server to two Seagate Iron Wolf M.2 SSD's - which are running in a raid1 configuration for failover. After setting up proxmox i started migrating all my VM's to it, thats where i noticed something weird. Proxmox...
  16. M

    Debian VM RAM Assigned As SWAP

    I have created a Debian 10 or 11 vm and added 6GB of RAM but, this is allocated as swap inside the vm, have i dun something wrong. I have tried other OS both, Linux and windows and this seems to be only happening with Debian, i have tried with and without ballooning enabled and changing the...
  17. E

    [SOLVED] kswapd0 using all CPU resources

    I solved this, it was a Virus! I was able to remove it with the help of this article. Hello I have proxmox installed on a server that has a AMD® Ryzen™ 5 3600 6c/12t @3.60GHz, 64 GB RAM and 2 x 480 GB NVME. On it there is 1 Windows 2019 Server running, 1 Ubuntu server and a owncloud cluster...
  18. K

    Understanding Proxmox memory saving features

    Hi there, We've been migrating away from our ESXI cluster to Proxmox, and it has been great so far, but I am still wondering about the memory saving features such as KSM and ballooning. Are KSM and Ballooning both enabled at the same time once the 80% limit has been reached? Will KSM /...
  19. A

    ballooning with windows guest issues

    Hello everyone. I got pve 6.3-2 and 2 windows VMs running server 2019. The server has 64gb RAM installed, i set each windows VM to 8GB min 48GB max i installed gemu-guest, all the missing drivers from virtio 1.185 i also installed the balloon service on each VM and it is shown as running. in...
  20. R

    Does ballooning not work in Windows 10 anymore?

    Config: Using virtio-win-0.1.185 Uninstalling the virtio drivers immediately releases all the memory. (I go from 9GB to 1.8G) Ballooning service is installed:


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