Limit CPU usage on Ubuntu with Systemd cgroups

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With the help of SystemD we will create CGroups in order to schedule CPU resources for a specific process. Useful if you would like to practice resources scheduling using system tools under Ubuntu.
Article on the subject: nevyan.blogspot.com/2019/10/c...
Ubuntu server administration course: www.udemy.com/course/ubuntu-l...
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Опубликовано:

15 июн 2024

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Комментарии : 29

@NevyanNeykov 3 года назад

Don't forget to subscribe for new content: ru-vid.com

@h1-hackermater Год назад

Hello from Argentina! I am so thankful for your explain in the video, because: I use Arch Linux on my laptop for my studies as software developer, and it was very useful to evade that my machine freeze and I can't use it, unless press reboot button (that's the only option).

@NevyanNeykov Год назад

Great to hear!

@mikehigdon9220 3 года назад

Very nice. Helped me for sure.

@NevyanNeykov 3 года назад

Glad it helped!

@user-ew2bg5us7w 11 месяцев назад

@nevyan Thanks for the video. I have a requirement to limit CPU and memory usage of a particular process using systemd and cgroup. Is there a separate video on this ? This limitation should apply to all users. Or is there a way to add my process name or id using the method shown in this video ?

@NevyanNeykov 11 месяцев назад

Nice task I would also like to update the videos some day, as such cases need experimentation.

@Dan-hh7ve 3 года назад

thanks for sharing Nevyan, what about settings for ex. CPUQuota for 1000 user permanently ? so it keeps this limit after reboot

@NevyanNeykov 3 года назад

From my case it was keeping the settings set, on one system I even had to reset them by setting them to -1. Depends on the systemd version I guess, otherwise you set them before provisioning the machine. From the docs: systemctl set-property - the adjustments will be made permanent unless --runtime option is passed.

@mikehigdon9220 3 года назад

@@NevyanNeykov I believe the settings are permanent unless you use the --runtime option from set-property

@NevyanNeykov 3 года назад

@@mikehigdon9220 exactly.

@MikkoRantalainen 2 года назад

2:19 We can easily obtain our user id from /etc/passwd :D How about running "id -u" instead?

@NevyanNeykov 2 года назад

great tip :)

@hannaescalante4421 2 года назад

Hello. How do you limit memory usage for mongodb using cgroups?

@NevyanNeykov 2 года назад

probably the same way as any other application ?

@_VISION. 2 года назад

What if you don't have a login user at the moment? I'm trying to do this in live boot mode before I download Linux again

@NevyanNeykov 2 года назад

hi, probably you can use system.slice.

@kamalraj2213 Год назад

I have a question. I am having aks cluster. So how i can actually check whether cgroup has been there and how to check if there is limit and request for pod has been there in cgroup. Can someone help plz

@NevyanNeykov Год назад

if you are using Kubernetes you can check with: kubectl describe pod Name_of_pod for podman: sudo podman stats --no-stream Name_of_pod

@MikkoRantalainen 2 года назад

Do you know how to *easily* configure systemd to put all Google Chrome processes in a single memory cgroup and limit the max memory usage to 50% of the system RAM on Ubuntu? It used to be easy with cgmanager but that can no longer be used with systemd because systemd wants to control everything.

@NevyanNeykov 2 года назад

perhaps those ones could be of help: unix.stackexchange.com/questions/451577/limit-memory-for-browser-on-fedora unix.stackexchange.com/questions/659744/why-cant-cpulimit-limit-chromium-browser

@MikkoRantalainen 2 года назад

@@NevyanNeykov Other than the example with `systemd-run` require using cgmanager which is no longer supported with recent systemd versions. And the `systemd-run` only works if that's the only way you actually launch that process.

@NevyanNeykov 2 года назад

Another possibility is to wrap the chromium process into a service where to use: MemoryMax to set the memory limit. On boot SystemD will auto start the service and apply the set limits to each new chromium instance.

@MikkoRantalainen 2 года назад

@@NevyanNeykov How would you do that? Chromium requires a separate X display connection for each logged in user. With cgmanager it was simple to create one memory cgroup for Chrome/Chromium but with systemd there doesn't seem to be any simple way to do that.

@NevyanNeykov 2 года назад

here is for firefox I guess: serverfault.com/questions/1058897/applying-systemd-control-group-resource-limits-automatically-to-specific-user-ap