Nginx 高并发系统内核优化

Author: Tinywan

Nginx/nginx-parameter-config.md

@@ -0,0 +1,68 @@
+# Nginx 高并发系统内核优化
+## socket 优化
+#### Nginx 优化
++   子进程允许打开的连接数：`worker_connections`
+#### 系统内核 优化
++   [内核参数的优化](http://blog.csdn.net/moxiaomomo/article/details/19442737)  
++   实践优化配置
+    +  编辑： `vim /etc/sysctl.conf`
+    +  配置结果
+        ```bash
+        net.ipv4.tcp_max_tw_buckets = 6000
+        net.ipv4.ip_local_port_range = 1024    65000
+        net.ipv4.tcp_tw_recycle = 1
+        net.ipv4.tcp_tw_reuse = 1
+        net.ipv4.tcp_syncookies = 1
+        net.core.somaxconn = 262144
+        net.core.netdev_max_backlog = 262144
+        net.ipv4.tcp_max_orphans = 262144
+        net.ipv4.tcp_max_syn_backlog = 262144
+        net.ipv4.tcp_syn_retries = 1
+        net.ipv4.tcp_fin_timeout = 1
+        net.ipv4.tcp_keepalive_time = 30
+        ```
+    +   执行命令使之生效：`/sbin/sysctl -p`       
+## 文件 优化
+#### Nginx 优化
++   指当一个nginx进程打开的最多文件描述符数目：`worker_rlimit_nofile 100000;`
+#### 系统内核 优化
++   系统限制其最大进程数：`ulimit -n`
++   编辑文件：`/etc/security/limits.conf`
+    ```conf
+    # End of file
+    root soft nofile 65535
+    root hard nofile 65535
+    * soft nofile 65535
+    * hard nofile 65535
+    ```
+## 优化配置文件
++   nginx优化配置文件
+    ```lua
+    user  www www;
+    worker_processes 8;
+    worker_cpu_affinity 00000001 00000010 00000100 00001000 00010000 00100000 01000000;
+    error_log  /www/log/nginx_error.log  crit;
+    pid        /usr/local/nginx/nginx.pid;
+    worker_rlimit_nofile 204800;
+    
+    events
+    {
+      use epoll;
+      worker_connections 204800;
+    }
+    ```
++   完整的内核优化配置
+    ```lua
+    net.ipv4.tcp_max_tw_buckets = 6000
+    net.ipv4.ip_local_port_range = 1024    65000
+    net.ipv4.tcp_tw_recycle = 1
+    net.ipv4.tcp_tw_reuse = 1
+    net.ipv4.tcp_syncookies = 1
+    net.core.somaxconn = 262144
+    net.core.netdev_max_backlog = 262144
+    net.ipv4.tcp_max_orphans = 262144
+    net.ipv4.tcp_max_syn_backlog = 262144
+    net.ipv4.tcp_syn_retries = 1
+    net.ipv4.tcp_fin_timeout = 1
+    net.ipv4.tcp_keepalive_time = 30
+    ```    

README.md

@@ -82,6 +82,7 @@
 +   [agentzh的Nginx教程（版本2016.07.21）](https://openresty.org/download/agentzh-nginx-tutorials-en.html#00-foreword01)
 +   [Nginx的11个Phases](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx/nginx-phases.md)
 +   [Nginx 陷阱和常见错误](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx/nginx-1-config.md)
++   [Nginx 高并发系统内核优化](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Nginx/nginx-parameter-config.md)
 
 ## <a name="Redis_base_knowledge"/>    Redis基础知识
 +   [Redis 简易安装教程](https://github.com/Tinywan/Lua-Nginx-Redis/blob/master/Redis/redis-install.md)