Comment 7 for bug 1413341

We have system default ``open_files`` limit which is enough for human user but may harm service environment

keystone@node-85:~$ ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 256968
max locked memory (kbytes, -l) 64
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 256968
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited

We already had an issue resolved such a way: https://bugs.launchpad.net/fuel/+bug/1405657