Debian Jessie and various other operating systems do not ship with Control Groups enabled. Control Groups allow for policing of memory, CPU and I/O usage. When starting applications relying on this functionality, you might encounter the following errors:
Failed to set cpu.cfs_period_us on /system.slice/systemd-tmpfiles-clean.service: Permission denied Failed to set cpu.cfs_quota_us on /system.slice/systemd-tmpfiles-clean.service: Permission denied
This error is thrown, due to the fact that cgroups aren't enabled. To enable this functionality, you will have to change the bootline in grub-config (/etc/default/grub) stating:
GRUB_CMDLINE_LINUX_DEFAULT="quiet cgroup_enable=memory swapaccount=1"
Update your GRUB configuration by running:
sudo update-grub
Reboot your server and cgroups are now available (at least for the memory component)