Information
https://docs.docker.com/engine/reference/commandline/daemon/
Solution
The default setting is good enough and can be left as-is. If you want to specifically set a non-default cgroup, pass --cgroup-parent parameter to the docker daemon when starting it.
For Example,
docker daemon --cgroup-parent=/foobar
Impact-
None.Default Value-
By default, docker daemon uses /docker for fs cgroup driver and system.slice for systemd cgroup driver.