Six methods for nginx optimization

[root@proxy ~]# ab -n 2000 -c 2000 http://192.168.4.5/
Benchmarking 192.168.4.5 (be patient)
socket: Too many open files (24) //Prompt that there are too many open files

[root@proxy ~]# vim /usr/local/nginx/conf/nginx.conf
.. ..
worker_processes 2; //Same as the number of CPU cores events {
worker_connections 65535; //The maximum number of concurrent connections per worker use epoll;
}
.. ..
[root@proxy ~]# nginx -s reload

[root@proxy ~]# ulimit -a //View all attribute values ​​[root@proxy ~]# ulimit -Hn 100000 //Set hard limit (temporary rule)
[root@proxy ~]# ulimit -Sn 100000 //Set soft limit (temporary rule)
[root@proxy ~]# vim /etc/security/limits.conf
 .. ..
* soft nofile 100000
* hard nofile 100000
#The configuration file is divided into 4 columns, as follows:
#User or group hard limit or soft limit The value of the item limit that needs to be restricted

[root@proxy ~]# ab -n 2000 -c 2000 http://192.168.4.5/

[root@proxy ~]# cat lnmp_soft/buffer.sh 
#!/bin/bash
URL=http://192.168.4.5/index.html?
for i in {1..5000}
do
 URL=${URL}v$i=$i
done
curl $URL //After 5000 cycles, a long URL address bar is generated [root@proxy ~]# ./buffer.sh
.. ..
<center><h1>414 Request-URI Too Large</h1></center> //Prompt that the header information is too large

[root@proxy ~]# vim /usr/local/nginx/conf/nginx.conf
.. ..
http {
client_header_buffer_size 1k; //Default request header information cache large_client_header_buffers 4 4k; //Number and capacity of caches for large request header information.. ..
}
[root@proxy ~]# nginx -s reload

[root@proxy ~]# cat /usr/local/nginx/conf/nginx.conf
http {
.. ..
gzip on; //Turn on compression gzip_min_length 1000; //Small files are not compressed gzip_comp_level 4; //Compression ratio gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
         //Compress specific files, refer to mime.types for types
.. ..

http { 
open_file_cache max=2000 inactive=20s;
  open_file_cache_valid 60s;
  open_file_cache_min_uses 5;
  open_file_cache_errors off;
//Set the server to cache a maximum of 2000 file handles, and close file handles that have no requests within 20 seconds. //The validity period of a file handle is 60 seconds, and it expires after 60 seconds. //Only files accessed more than 5 times will be cached.}

[root@proxy ~]# vim /usr/local/nginx/conf/nginx.conf
server {
  listen 80;
  server_name localhost;
  location / {
   root html;
   index index.html index.htm;
  }
location ~* \.(jpg|jpeg|gif|png|css|js|ico|xml)$ {
expires 30d; //Define the client cache time to 30 days}
}
[root@proxy ~]# cp /usr/share/backgrounds/day.jpg /usr/local/nginx/html
[root@proxy ~]# nginx -s reload