How to set nginx max open files?

Question

Though I have done the following setting, and even restarted the server:

# head /etc/security/limits.conf -n2
www-data soft nofile -1
www-data hard nofile -1
# /         


        

Answer 1

I found the answer in few minutes after posting this question...

# cat /etc/default/nginx
# Note: You may want to look at the following page before setting the ULIMIT.
#  http://wiki.nginx.org/CoreModule#worker_rlimit_nofile
# Set the ulimit variable if you need defaults to change.
#  Example: ULIMIT="-n 4096"
ULIMIT="-n 15000"

/etc/security/limit.conf is used by PAM, so it shoud be nothing to do with www-data (it's nologin user).