By

Contents
  1. 1. 1.优化worker进程个数
  2. 2. 2.访问日志配置实战
  3. 3. Nginx并发连接数量

1.优化worker进程个数

查看cpu总核数

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# grep processor /proc/cpuinfo|wc -l
2 #表示为1颗CPU四核

查看CPU总颗数：

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# grep 'physical id' /proc/cpuinfo|sort|uniq|wc -l
1 #对physical id去重计数，表示1颗cpu
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# vim nginx.conf
worker_processes 2;
# /application/nginx/sbin/nginx -t
# /application/nginx/sbin/nginx -s reload

2.访问日志配置实战

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sed -n '21,23 s/#//gp' ../conf/nginx.conf.default
log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';

vim nginx.con
error_log  logs/error.log;
...
http {
...
log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
		  '$status $body_bytes_sent "$http_referer" '
		  '"$http_user_agent" "$http_x_forwarded_for"';

access_log  logs/access.log  main;
   
...
   }

Nginx访问日志轮询切割

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# cat /server/script/cut_nginx_log.sh
#!/bin/sh
Dateformat=`date +%Y%m%d`
Basedir="/application/nginx"
Nginxlogdir="$Basedir/logs"
Logname="access"
[ -d $Nginxlogdir ] && cd $Nginxlogdir || exit 1
[ -f ${Logname}.log ]|| exit1
/bin/mv ${Logname}.log ${Dateformat}_${Logname}.log
$Basedir/sbin/nginx -s reload

cat >> /var/spool/cron/root <<EOF
#cut nginx access log by cwzhou
00 00 * * * /bin/sh /server/script/cut_nginx_log.sh > /dev/null 2>&1
EOF

#check result
#crontab -l

Nginx并发连接数量

Reference ngx_http_limit_conn_module
1.限制单ip并发连接数

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vim nginx.conf
...
http{
    ...
    limit_conn_zone $binary_remote_addr zone=addr:10m;
    server{
	...
	location / {
		...
		limit_conn addr 1; #限制单ip的并发连接为1
        }
   }
}
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ab -c 1 -n 10 http://10.0.0.3/  #模拟并发连接1,访问10次服务器
# -c为并发数 -n为请求书 10.0.0.3为nginx的Ip地址

应用场景之一是服务器下载：

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location /download/ {
	limit_conn add 1;
}

2.限制虚拟主机总连接数

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vim nginx.conf
...
http{
    ...
    limit_conn_zone $binary_remote_addr zone=addr:10m;
    limit_conn_zone $server_name zone=perserver:10m;

    server{
	...
	location / {
		...
		limit_conn perserver 2; #限制虚拟主机连接数为2
        }
   }
}
Contents
  1. 1. 1.优化worker进程个数
  2. 2. 2.访问日志配置实战
  3. 3. Nginx并发连接数量