I'd like to limit the total memory used by user www-data
in Ubuntu Server 14.04 LTS. I've read that I can do this via cgroups.
This is what I've done so far:
# install
apt-get install cgroup-bin
# create group for user www-data
cgcreate -a 'www-data' -g memory,cpu:'www-data'
# validate that the cgroup fs was created
ll /sys/fs/cgroup/cpu/www-data
ll /sys/fs/cgroup/memory/www-data
# adjust cpu and memory
echo 100 > /sys/fs/cgroup/cpu/www-data/cpu.shares
echo 100000000 > /sys/fs/cgroup/memory/www-data/memory.limit_in_bytes
Now what? How do I enforce these settings to user www-data
?
edit: Note that if there is a better/best way to do this via other means (e.g systemd
) then please suggest it.