KSM Kernel Samepage Merging is running in the Linux kernel and scans the memory of all the virtual machines running on a single host, looking for duplication and consolidating. By using our site, you acknowledge that you have read and understand our Cookie Policy , Privacy Policy , and our Terms of Service. Cookies help us deliver our services. Please stop emailing me about this, I’m not interested in your views on it] By day I work for Red Hat on all things to do with virtualization. Thijs Simonis 41 2. If all your vm’s are, genuinely, actively paging all memory in the guests – the hypervisor won’t be able to do much about it.

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It was integrated in PVE since version 1. Tagged as balloonkvmvirtiovirtio-balloonvirtualization.

Zeta Systems Blog

Discussion View source History. Create account Log in. All of this is done without needing to pause or reboot the guest.

Leave a Reply Cancel reply Enter your comment here And I don’t think unraid runs with swap? I’m not sure on kvm’s default behaviour if guests exhaust memory – vmware will start swapfiling so killing performance but at least keeping the guests up.


That is, hosts that are running VMs whose total memory size is greater than what the host has physically available. No, I was just doing overprovisioning tests. You are commenting using your Twitter account. Modern Linux Kernels does include the Balloon drivers by default.

Hi can you wundows tell me the correct procedure to use a virtioballoon I in Linux. As above ballooning is a last resort but isn’t magic and can’t always fix the issue. Notify me of new comments via email.

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They can be found herebut note that much has changed since this talk. Post as a guest Name.

Works alot better on linux guests rather than windows though as its built into the linux kernel. I don’t mind being wrong I’m often wrongand I don’t mind changing my mind.

Please stop emailing me about this, I’m not interested in your views on it] By day I work for Red Hat on all things to do with virtualization. The balloon device is important to support memory over-commitment because it allows for reducing a guest’s memory size if needed. Sign up or log in Sign up using Google.


Dynamic Memory Management – Proxmox VE

This page was last edited on 19 Januaryat Sorry, your blog cannot share posts by email. The VM decides which processes or cache pages to swap out to free up memory for the balloon. May 7, at 3: Consequently I am an bqlloon [To nutcases: Sign up using Email and Password. Adeus chroot… seja bem vindo LXC… Vinipsmaker labs. Ballooning is smart or dumb?

This driver acts like a kind of weird process, either expanding its own memory usage or shrinking down to nearly nothing, as bakloon the diagrams below: March 5, at December 2, at 6: July 11, at 2: Email required Address never made public. It could like this: