Hello Debian users :)
I have googled a little bit and came to the conclusion that cgroups
should be managed with systemd. (Thanks to Nicolas George for the
systemd hint :^) )
For anyone who is interested here is a good guide from RedHat about
resource management with cgroups and systemd:
PDF:
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/pdf/Resource_Management_Guide/Red_Hat_Enterprise_Linux-7-Resource_Management_Guide-en-US.pdf
Single page html:
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html-single/Resource_Management_Guide/index.html
Have a nice day guys ;)
best regards
mo