on some vps you need to add this 2 lines on : /etc/security/limits.conf
root soft nofile 40000
root hard nofile 40000
and reboote server
do not use YES or NO in config file
use only 1 or 0
work with all profile the best version no freeze
root soft nofile 40000
root hard nofile 40000
and reboote server
do not use YES or NO in config file
use only 1 or 0
work with all profile the best version no freeze