⑯.nginx 优化

调整打开文件数

vim /etc/security/limits.conf
//针对root用户
root soft nofile 65535
root hard nofile 65535
//所有用户, 全局
* soft nofile 25535
* hard nofile 25535

//对于Nginx进程
worker_rlimit_nofile 45535;

//root用户 
//soft提醒
//hard限制 
//nofile文件数配置项
//65535最大大小

Nginx性能优化

CPU亲和, 减少进程之间不断频繁迁移, 减少性能损耗

1.查看当前CPU物理状态

[root@nginx ~]# lscpu |grep "CPU(s)"
CPU(s):                24
On-line CPU(s) list:   0-23
NUMA node0 CPU(s):     0,2,4,6,8,10,12,14,16,18,20,22
NUMA node1 CPU(s):     1,3,5,7,9,11,13,15,17,19,21,23

//2颗物理cpu,没颗cpu12核心, 总共24核心

2.将Nginx worker进程绑到不同的核心上

//启动多少worker进程, 官方建议和cpu核心一致, 第一种绑定组合方式
#worker_processes 24;
#worker_cpu_affinity 000000000001 000000000010 000000000100 000000001000 000000010000 000000100000 000001000000 000010000000 000100000000 001000000000 010000000000 10000000000;

//第二种方式
#worker_processes 2;
#worker_cpu_affinity 101010101010 010101010101;

//最佳方式绑定方式
worker_processes auto;
worker_cpu_affinity auto;

3.查看nginx worker进程绑定至对应cpu

ps -eo pid,args,psr|grep [n]ginx

4.Nginx通用优化配置文件

[root@nginx ~]# cat nginx.conf
user nginx;
worker_processes auto;
worker_cpu_affinity auto;

error_log /var/log/nginx/error.log warn;
pid /run/nginx.pid;
#调整至1w以上,负荷较高建议2-3w以上
worker_rlimit_nofile 35535;

events {
    use epoll;
#限制每个进程能处理多少个连接请求,10240x16
    worker_connections 10240;
}

http {
    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;
# 统一使用utf-8字符集
    charset utf-8;

    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  /var/log/nginx/access.log  main;

# Core module
    sendfile            on;
# 静态资源服务器建议打开
    tcp_nopush          on;
# 动态资源服务建议打开,需要打开keepalived
    tcp_nodelay         on;
    keepalive_timeout   65;

# Gzip module
    gzip on;
    gzip_disable "MSIE [1-6].";
    gzip_http_version 1.1;

# Virtal Server
    include /etc/nginx/conf.d/*.conf;
}