What are the main aspects of nginx tuning?

Optimize the maximum number of connections allowed by a single Nginx process (Recommended learning: nginx tutorial)

Control a single Nginx process The parameter for the maximum number of connections allowed is worker_connections. This parameter should be adjusted based on server performance and memory usage.

The maximum number of connections for a process is limited by the maximum number of files opened by the Linux system process. Worker_connections can only take effect after "ulimit -HSn 65535" is executed.

The number of connections includes proxy server connections, client connections, etc. The total number of Nginx concurrent connections = worker_processes * worker_connections. The total number can be kept around 3w.

worker_processes  2;
worker_cpu_affinity 01 10;
user nginx nginx;
events {
    use epoll;
    worker_connections  15000;
}

Bind Nginx processes to different CPUs

By default, multiple Nginx processes may run on a certain CPU or a certain core of the CPU As a result, the Nginx process uses hardware resources unevenly. Therefore, binding the Nginx process to different CPUs is to make full use of the multi-CPU and multi-core resources of the hardware.

[root@localhost ~]# grep -c processor /proc/cpuinfo    # 查看CPU核数
2
worker_processes  2;         # 2核CPU的配置
worker_cpu_affinity 01 10;
 
worker_processes  4;         # 4核CPU的配置
worker_cpu_affinity 0001 0010 0100 1000;   
 
worker_processes  8;         # 8核CPU的配置
worker_cpu_affinity 00000001 00000010 00000100 00001000 00010000 00100000 01000000 1000000;
 
[root@localhost ~]# /usr/local/nginx/sbin/nginx -t
[root@localhost ~]# /usr/local/nginx/sbin/nginx -s reload

Optimize the maximum number of connections allowed by a single process of Nginx

The parameter that controls the maximum number of connections allowed by a single process of Nginx is worker_connections. This parameter should be based on server performance and memory. Adjust the usage amount.

The maximum number of connections for a process is limited by the maximum number of files opened by the Linux system process. Worker_connections can only take effect after "ulimit -HSn 65535" is executed.

The number of connections includes proxy server connections, client connections, etc. The total number of Nginx concurrent connections = worker_processes * worker_connections. The total number can be kept around 3w.

worker_processes  2;
worker_cpu_affinity 01 10;
user nginx nginx;
events {
    use epoll;
    worker_connections  15000;
}

The above is the detailed content of What are the main aspects of nginx tuning?. For more information, please follow other related articles on the PHP Chinese website!