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Tags: 16.04   upgrade   swap   cpu-load   unattended-upgrades  
Link: πŸ” See Original Answer on Ask Ubuntu πŸ”—

URL: https://askubuntu.com/q/1164186
Title: Is it possible to patch without spiking the CPU?
ID: /2019/08/07/Is-it-possible-to-patch-without-spiking-the-CPU_
Created: August 7, 2019    Edited:  August 8, 2019
Upload: November 24, 2022    Layout:  post
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I think this answer contains everything you are looking for:

OK, I managed myself to do the same you did, but with some changes:

1) I installed the same utilities:

sudo apt-get install cgroup-bin cgroup-lite cgroup-tools cgroupfs-mount libcgroup1

2) I edited conf files like this:

sudo -H gedit /etc/init/cgroup-lite.conf

description "mount available cgroup filesystems"
author "Serge Hallyn <serge.hallyn@canonical.com>"

start on mounted MOUNTPOINT=/sys/fs/cgroup

pre-start script
test -x /bin/cgroups-mount || { stop; exit 0; }
test -d /sys/fs/cgroup || { stop; exit 0; }
/bin/cgroups-mount
cgconfigparser -l /etc/cgconfig.conf ```  end script

post-stop script

	if [ -x /bin/cgroups-umount ]
	then
		/bin/cgroups-umount
	fi

end script


`sudo -H gedit /etc/cgconfig.conf`

Since systemd is working well, this section may not be necessary.

Uncomment if you need it

#

mount {

cpuacct = /cgroup/cpuacct;

memory = /cgroup/memory;

devices = /cgroup/devices;

freezer = /cgroup/freezer;

net_cls = /cgroup/net_cls;

blkio = /cgroup/blkio;

cpuset = /cgroup/cpuset;

cpu = /cgroup/cpu;

}

group limitcpu{ cpu { cpu.shares = 400; } }

group limitmem{ memory { memory.limit_in_bytes = 512m; } }

group limitio{ blkio { blkio.throttle.read_bps_device = β€œ252:0 2097152”; } }

group browsers { cpu {

Set the relative share of CPU resources equal to 25%

cpu.shares = "256"; } memory { #       Allocate at most 512M of memory to tasks
    memory.limit_in_bytes = "512m"; #       Apply a soft limit of 512 MB to tasks
    memory.soft_limit_in_bytes = "384m";
} }

group media-players { cpu {

Set the relative share of CPU resources equal to 25%

    cpu.shares = "256";
}
memory { #       Allocate at most 256M of memory to tasks
    memory.limit_in_bytes = "256m"; #       Apply a soft limit of 196 MB to tasks
    memory.soft_limit_in_bytes = "128m";
} }

cgconfigparser -l /etc/cgconfig.conf


`sudo -H gedit /etc/cgrules.conf`

user:process subsystems group [user]:/usr/lib/chromium-browser/chromium-browser cpu,memory browsers [user]:/usr/bin/clementine cpu,memory media-players


**Note: This section needs to be updated with `/usr/bin/apt`**

That is an example, use your username instead of [user]. You can add the applications you need to limit and define whether you want them to be CPU-, memory- or both limited.

I edited the `GRUB_CMDLINE_LINUX_DEFAULT` line in `/etc/default/grub`:

GRUB_CMDLINE_LINUX_DEFAULT=”cgroup_enable=memory swapaccount=1”


Updating it: 

sudo update-grub ```

3) And finally rebooting to apply changes.

And that is how I’ve got this working. Before this I was having
frequent OOMs with multitasking - with chromium-browser, clementine,
sublime-text and other applications using a lot of resources -, now
they are running smoothly and I can multitask better.


Additional cgroups resources:

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