Missing memory stats in Systemd Services table on Raspberry Pi

[davidemyers]

If you're missing the memory stats for running services in the new Systemd Services table, and you're using a Raspberry Pi, it might be because your OS provider has deliberately disabled the "cgroups memory controller". There are three ways to confirm if this is causing your issue:

1. Running systemctl status for a service does not show memory information.
2. You do not see memory in the output of cat /sys/fs/cgroup/cgroup.controllers
3. You see cgroup_disable=memory in the output of cat /proc/cmdline

To enable the "cgroups memory controller" you need to add cgroup_enable=memory to your cmdline.txt file, which is usually in /boot/firmware, but might be in /boot/firmware/current if you're running Ubuntu 25.10 or later. Then you will need to reboot.

See this commit and the commit it references for why this feature is disabled by default.

[henrygd]

Thanks very much, I updated the docs to mention this and link to your comment 👍

[braxtone]

Thank you so much! I spent way too much time figuring out where to enable this on a new Ubuntu (25.10 as you mentioned) system. This was so helpful. Knowing to search for /boot/firmware/current I ran across a couple articles that may be helpful for future travelers.

• https://waldorf.waveform.org.uk/2025/pull-yourself-up-by-your-bootstraps.html
• by way of https://discourse.ubuntu.com/t/call-for-testing-a-b-boot-on-raspberry-pi/64173

[davidemyers]

It appears that this is no longer an issue as of Ubuntu 26.04. The "cgroups memory controller" is no longer disabled by default.

[braxtone]

Oh that is cool, thanks for the heads up! Looking into it: Ubuntu 26.04 removes cgroups v1 altogether and moves to cgroups v2 where controllers are loaded dynamically, and even so, memory is enabled by default.

This article had some great background on the cutover: https://computingforgeeks.com/ubuntu-2604-cgroup-v2-migration/