Look this images.
I added a limit of 120M for the service. But when I do top shows it use 16% of memory. This is more than 125M (RPi 1gb of RAM).
I'm understanding things wrong or it's not working?
Ps:. apparently this service has 2 pid, whitch shows 16% is one (PID 640), and when I do systemctl status is another (PID 521).
Worked!!!
When you said
at the end of /flash/cmdline.txt
I thought it was to put in the line below, as this did not work. Today I add cgroup_enable=cpuset cgroup_enable=memory cgroup_memory=1 in the end of the line that already exists. So, staying that way
boot=/dev/mmcblk0p1 disk=/dev/mmcblk0p2 quiet cgroup_enable=cpuset cgroup_enable=memory cgroup_memory=1and worked! 
I will open a new thread specifically asking about how to put a limit (Memory Max=) in a systemd service in a Raspberry Pi.
Thank you very much again for help me!
Sorry, the page had not yet refresh when I posted it.
I added this and put MemoryMax=100M in the service, but it still does not show in status.
I will open a new thread specifically asking about how to put a limit (Memory Max=) in a systemd service in a Raspberry Pi.
Thank you very much again for help me!
I added, but don't worked too 
Must be RPi difference then. Maybe some kernel config... Some CGROUP or MEMCG parameter.
Anyway, thank you very much for trying to help!
I installed LE on another sd card and it's the same. I'm starting to think it's because I use in RPi version.
@Klojum , Can you help me?
You can set parameters dynamically:
Codesystemctl set-property kodi CPUAccounting=yes systemctl set-property kodi BlockIOAccounting=no systemctl set-property kodi MemoryAccounting=yes systemctl set-property kodi MemoryMax=100M systemctl status kodi
This don't worked too
Because the system partition of LibreELEC is a read-only partition, which is for a good reason. LibreELEC is set up for use as a HTPC environment, it's not meant for the typical tweaking & fiddling IT tinkerer.
You can edit things of you mount the partition as writeable first.
Just know that all edits will be gone with the next LibreELEC downgrade/upgrade.
How can I make it writable? To test this
DefaultMemoryAccounting=yes
CPUAccounting=yes
MemoryAccounting=yes there.
My hardware is a Raspberry Pi 3b, your is the same?
But this don't interfere in anything, right?
I have the same.
I also clean all settings and start from fresh and still see memory line.
Try adding line
CodeDefaultMemoryAccounting=yesor
CodeCPUAccounting = yes MemoryAccounting = yes
After add, CPU: 233ms shows, but memory don't.
systemctl --version
Show this:
systemctl --version
systemd 239
-PAM -AUDIT -SELINUX -IMA -APPARMOR -SMACK +SYSVINIT -UTMP -LIBCRYPTSETUP -GCRYPT -GNUTLS -ACL -XZ -LZ4 -SECCOMP +BLKID -ELFUTILS +KMOD -IDN2 -IDN -PCRE2 default-hierarchy=hybridWell, then you are using LE 8.2 I assume.
Use LE 9 and you will see this line
Because this is supported with systemd 232.
No. I'm in LE 9. Before I use LE 9 I'm was in beta version, so I update via own LE.
You think this has made something wrong?
How can I check which systemd version I'm on?
I tried MemoryLimit=100M argument too, and don't work. Does not show in status.
Do you see Memory line with kodi service?
No. Look:
# systemctl status kodi -l |cat -
● kodi.service - Kodi Media Center
Loaded: loaded (/usr/lib/systemd/system/kodi.service; disabled; vendor preset: disabled)
Active: active (running) since Fri 2018-06-22 08:11:53 -03; 7 months 21 days ago
Process: 500 ExecStartPre=/usr/lib/kodi/kodi-config (code=exited, status=1/FAILURE)
Main PID: 515 (kodi.sh)
CGroup: /system.slice/kodi.service
├─515 /bin/sh /usr/lib/kodi/kodi.sh --standalone -fs
└─549 /usr/lib/kodi/kodi.bin --standalone -fs
Jun 22 08:11:53 LibreELEC systemd[1]: Starting Kodi Media Center...
Jun 22 08:11:53 LibreELEC systemd[1]: Started Kodi Media Center.In which service you are trying to add this?
CodeLibreELEC:~ # cat /storage/.config/system.d/service.tigervnc.service [Unit] Description=TigerVNC After=graphical.target [Service] Environment=DISPLAY=:0.0 ExecStart=/bin/sh /storage/.kodi/addons/service.tigervnc/bin/tigervnc.start TimeoutStopSec=1 Restart=always RestartSec=2 StartLimitInterval=0 MemoryMax=100M [Install] WantedBy=kodi.target LibreELEC:~ # systemctl status service.tigervnc -l | cat - ● service.tigervnc.service - TigerVNC Loaded: loaded (/storage/.kodi/addons/service.tigervnc/system.d/service.tigervnc.service; enabled; vendor preset: disabled) Active: active (running) since Sun 2019-02-10 14:56:45 CET; 7s ago Main PID: 926 (sh) Memory: 1.0M (max: 100.0M) CGroup: /system.slice/service.tigervnc.service ├─926 /bin/sh /storage/.kodi/addons/service.tigervnc/bin/tigervnc.start └─933 x0vncserver -PasswordFile=/storage/.kodi/userdata/addon_data/service.tigervnc/passwd -rfbport=5900 Feb 10 14:56:45 LibreELEC systemd[1]: Started TigerVNC. Feb 10 14:56:45 LibreELEC sh[926]: Sun Feb 10 14:56:45 2019 Feb 10 14:56:45 LibreELEC sh[926]: Geometry: Desktop geometry is set to 800x600+0+0 Feb 10 14:56:45 LibreELEC sh[926]: XDesktop: Using evdev codemap Feb 10 14:56:45 LibreELEC sh[926]: XDesktop: XTest extension present - version 2.2 Feb 10 14:56:45 LibreELEC sh[926]: Main: Listening on port 5900
Weird! My .service is like your, but like I said when I do systemctl status it doesn't show Memory: 1.0M (max: 100.0M
like your.
You have made alterations on /etc/systemd/system.conf?
You ad this parameter to one real service file or empty one?
I have added it to tigervnc service and it is in use.Codesystemctl status service.tigervnc -l Main PID: 1000 (sh) Memory: 1.0M CGroup: /system.slice/service.tigervnc.service # add parameter to service and restart systemctl status service.tigervnc -l Main PID: 1017 (sh) Memory: 1.0M (max: 100.0M) CGroup: /system.slice/service.tigervnc.service
I added for a real service.
Can you show your .service to I see how you do?
Memory: 1.0M
When I do systemctl status myservice.service never show this!