After I do this on my Debian Stretch:
sudo apt install cgroup-bin cgroup-tools cgroupfs-mount libcgroup1
I can issue this:
sudo systemctl set-property user-1000.slice CPUQuota=40%
I have 4 vCPU host, each CPU takes 10% hit with "stress -cpu 4", but after reboot, I can no longer get the "CPUQuota" to work, again.
I have already have "GRUB_CMDLINE_LINUX_DEFAULT="cgroup_enable=memory swapaccount=1"
So how do I get systemd resource management to work after each reboot without having to reissue:
sudo apt --reinstall install cgroup-bin cgroup-tools cgroupfs-mount libcgroup1