How to configure the maximum number of files that can be opened by each Nginx process

#View the current resource limit settings 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) 7268
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) 7268
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited

# View the maximum number of open files in the system ulimit -n
1024

#Permanently set the maximum limit on the number of open files in the system vi /etc/security/limits.conf
#Add parameters at the end...
*soft nofile 102400
* hard nofile 102400


#Temporarily set the maximum limit on the number of open files in the system ulimit -n 102400

#Test operation, whether to permanently load the configuration after restart #System restart init 6

#Test successful, set the maximum limit on the number of open files correctly ulimit -n
102400

vi /usr/local/nginx/conf/nginx.conf
user nginx;
worker_processes 4;
worker_cpu_affinity 0001 0010 0100 1000;
worker_rlimit_nofile 102400;
......

#Check if there is any problem with nginx configuration nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful

#Reload nginx
nginx -s reload