如何优化高流量站点的nginx和php-fpm的几个方面

喜欢ヅ旅行 2022-06-12 08:24 108阅读 0赞

### 通信机制的选择 ###

[nginx和php-fpm 是使用 tcp socket 还是 unix socket ？][nginx_php-fpm _ tcp socket _ unix socket]

### 合理的配置nginx处理请求数 ###

#cat /proc/cpuinfo | grep processor #查看服务器cpu的处理器数量
    # vi /etc/nginx/nginx.conf
    worker_processes 16;  #修改为处理器数量
    events { 
      worker_connections 4096; # 单个woker进程最大连接并发数 
      multi_accept on;  #linux2.6+默认epoll，如果使用了更优秀的kqueue模型，则使用默认off。
    }
     
      
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### 配置nginx+php-fpm负载均衡 ###

单机能力有限，比如要支持1000台并发，生成两个sock文件，让每个[PHP][]\-fpm处理500台。

# nginx.conf
    upstream backend { 
      server unix:/dev/shm/php-fpm.sock1 weight=100 max_fails=5 fail_timeout=5; 
      server unix:/dev/shm/php-fpm.sock2 weight=100 max_fails=5 fail_timeout=5; 
    }
    
    
    # php-fpm.conf(同理，php7在的配置文件末行引入了pool.d的所有配置)
    # www1.conf
    listen = /dev/shm/php-fpm.sock1;
    listen.backlog = -1  
    listen.allowed_clients = 127.0.0.1
    
    pm.max_children = 500
    pm.max_requests = 5000
    
    rlimit_files = 50000
    request_slowlog_timeout = 20s
    slowlog = /var/log/php-slow.log
    
    # cp www1.conf www.conf2
    listen = /dev/shm/php-fpm.sock2;
    
     
      
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### 禁止访问日志文件 ###

高流量站点涉及大量I/O，必须在线程间同步。

# nginx.conf
    access_log off; 
    log_not_found off; 
    error_log /var/log/nginx-error.log warn;
     
      
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如果不能关闭日志访问，至少设置缓冲

access_log /var/log/nginx/access.log main buffer=16k;
     
      
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### 启用GZip ###

# nginx.conf
    gzip on; 
    gzip_disable "msie6"; 
    gzip_vary on; 
    gzip_proxied any; 
    gzip_comp_level 6; 
    gzip_min_length 1100; 
    gzip_buffers 16 8k; 
    gzip_http_version 1.1; 
    gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
     
      
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### 缓存经常访问的文件 ###

# nginx.conf
    open_file_cache max=2000 inactive=20s; 
    open_file_cache_valid 60s; 
    open_file_cache_min_uses 5; 
    open_file_cache_errors off;
     
      
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### 调整客户端超时 ###

# nginx.conf
    client_max_body_size 50M; 
    client_body_buffer_size 1m; 
    client_body_timeout 15; 
    client_header_timeout 15; 
    keepalive_timeout 2 2; 
    send_timeout 15; 
    sendfile on; 
    tcp_nopush on; 
    tcp_nodelay on;
     
      
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### 调整输出缓冲区 ###

# nginx.conf
    fastcgi_buffers 256 16k; 
    fastcgi_buffer_size 128k; 
    fastcgi_connect_timeout 3s; 
    fastcgi_send_timeout 120s; 
    fastcgi_read_timeout 120s; 
    fastcgi_busy_buffers_size 256k; 
    fastcgi_temp_file_write_size 256k; 
    reset_timedout_connection on; 
    server_names_hash_bucket_size 100;
     
      
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### 调整/etc/sysctl.conf ###

# Recycle Zombie connections 
    net.inet.tcp.fast_finwait2_recycle=1 
    net.inet.tcp.maxtcptw=200000 
    
    # Increase number of files 
    kern.maxfiles=65535 
    kern.maxfilesperproc=16384 
    
    # Increase page share factor per process 
    vm.pmap.pv_entry_max=54272521 
    vm.pmap.shpgperproc=20000 
    
    # Increase number of connections 
    vfs.vmiodirenable=1 
    kern.ipc.somaxconn=3240000 
    net.inet.tcp.rfc1323=1 
    net.inet.tcp.delayed_ack=0 
    net.inet.tcp.restrict_rst=1 
    kern.ipc.maxsockbuf=2097152 
    kern.ipc.shmmax=268435456 
    
    # Host cache 
    net.inet.tcp.hostcache.hashsize=4096 
    net.inet.tcp.hostcache.cachelimit=131072 
    net.inet.tcp.hostcache.bucketlimit=120 
    
    # Increase number of ports 
    net.inet.ip.portrange.first=2000 
    net.inet.ip.portrange.last=100000 
    net.inet.ip.portrange.hifirst=2000 
    net.inet.ip.portrange.hilast=100000 
    kern.ipc.semvmx=131068 
    
    # Disable Ping-flood attacks 
    net.inet.tcp.msl=2000 
    net.inet.icmp.bmcastecho=1 
    net.inet.icmp.icmplim=1 
    net.inet.tcp.blackhole=2 
    net.inet.udp.blackhole=1
     
      
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### Nginx状态监控 ###

Nginx中的stub\_status模块主要用于查看Nginx的一些状态信息，默认不会编译进Nginx，重新编译安装nginx stub\_status模块，

持续监视打开的连接数，可用内存和等待线程数。 设置警报以在阈值超过时通知您。您可以自己构建这些警报，或使用像ServerDensity。 请务必安装NGINX stub\_status模块 你需要重新编译NGINX -

./configure \
    --prefix=/usr/local/nginx \ --with-http_stub_status_module \ 
    make && make install
     
      
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安装完毕后在server块中加入location

server{  
             location /nginx-status {  
                 stub_status on; 
            }  
    } 
     
      
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重启nginx后访问www.x.com/nginx-status即可看到返回的信息

active connections – 活跃的连接数量
    server accepts handled requests — 总共处理了11989个连接 , 成功创建11989次握手, 总共处理了11991个请求
    reading — 读取客户端的连接数.
    writing — 响应数据到客户端的数量
    waiting — 开启 keep-alive 的情况下,这个值等于 active – (reading+writing), 意思就是 Nginx 已经处理完正在等候下一次请求指令的驻留

[nginx_php-fpm _ tcp socket _ unix socket]: http://blog.csdn.net/qq624202120/article/details/60957634
[PHP]: http://lib.csdn.net/base/php