Nginx服务器高性能优化的配置方法小结

通常来说，一个优化良好的 Nginx Linux 服务器可以达到 500,000 – 600,000 次/秒 的请求处理性能，然而我的 Nginx 服务器可以稳定地达到 904,000 次/秒 的处理性能，并且我以此高负载测试超过 12 小时，服务器工作稳定。

这里需要特别说明的是，本文中所有列出来的配置都是在我的测试环境验证的，而你需要根据你服务器的情况进行配置：

从 EPEL 源安装 Nginx：

yum -y install nginx

备份配置文件，然后根据你的需要进行配置：

cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.orig  vim /etc/nginx/nginx.conf

# This number should be, at maximum, the number of CPU cores on your system.# (since nginx doesn't benefit from more than one worker per CPU.)# 这里的数值不能超过 CPU 的总核数，因为在单个核上部署超过 1 个 Nginx 服务进程并不起到提高性能的作用。worker_processes 24; # Number of file descriptors used for Nginx. This is set in the OS with 'ulimit -n 200000'# or using /etc/security/limits.conf# Nginx 最大可用文件描述符数量，同时需要配置操作系统的 "ulimit -n 200000"，或者在 /etc/security/limits.conf 中配置。 worker_rlimit_nofile 200000; # only log critical errors# 只记录 critical 级别的错误日志error_log /var/log/nginx/error.log crit # Determines how many clients will be served by each worker process.# (Max clients = worker_connections * worker_processes)# "Max clients" is also limited by the number of socket connections available on the system (~64k)# 配置单个 Nginx 单个进程可服务的客户端数量，（最大值客户端数 = 单进程连接数 * 进程数 ）# 最大客户端数同时也受操作系统 socket 连接数的影响（最大 64K ）worker_connections 4000; # essential for linux, optmized to serve many clients with each thread# Linux 关键配置，允许单个线程处理多个客户端请求。use epoll; # Accept as many connections as possible, after nginx gets notification about a new connection.# May flood worker_connections, if that option is set too low.# 允许尽可能地处理更多的连接数，如果 worker_connections 配置太低，会产生大量的无效连接请求。multi_accept on; # Caches information about open FDs, freqently accessed files.# Changing this setting, in my environment, brought performance up from 560k req/sec, to 904k req/sec.# I recommend using some varient of these options, though not the specific values listed below.# 缓存高频操作文件的FDs（文件描述符/文件句柄）# 在我的设备环境中，通过修改以下配置，性能从 560k 请求/秒 提升到 904k 请求/秒。# 我建议你对以下配置尝试不同的组合，而不是直接使用这几个数据。open_file_cache max=200000 inactive=20s;open_file_cache_valid 30s;open_file_cache_min_uses 2;open_file_cache_errors on; # Buffer log writes to speed up IO, or disable them altogether# 将日志写入高速 IO 存储设备，或者直接关闭日志。# access_log /var/log/nginx/access.log main buffer=16k;access_log off; # Sendfile copies data between one FD and other from within the kernel.# More efficient than read() + write(), since the requires transferring data to and from the user space.# 开启 sendfile 选项，使用内核的 FD 文件传输功能，这个比在用户态用 read() + write() 的方式更加高效。sendfile on; # Tcp_nopush causes nginx to attempt to send its HTTP response head in one packet,# instead of using partial frames. This is useful for prepending headers before calling sendfile,# or for throughput optimization.# 打开 tcp_nopush 选项，Nginux 允许将 HTTP 应答首部与数据内容在同一个报文中发出。# 这个选项使服务器在 sendfile 时可以提前准备 HTTP 首部，能够达到优化吞吐的效果。tcp_nopush on; # don't buffer data-sends (disable Nagle algorithm). Good for sending frequent small bursts of data in real time.# 不要缓存 data-sends （关闭 Nagle 算法），这个能够提高高频发送小数据报文的实时性。tcp_nodelay on; # Timeout for keep-alive connections. Server will close connections after this time.# 配置连接 keep-alive 超时时间，服务器将在超时之后关闭相应的连接。keepalive_timeout 30; # Number of requests a client can make over the keep-alive connection. This is set high for testing.# 单个客户端在 keep-alive 连接上可以发送的请求数量，在测试环境中，需要配置个比较大的值。keepalive_requests 100000; # allow the server to close the connection after a client stops responding. Frees up socket-associated memory.# 允许服务器在客户端停止发送应答之后关闭连接，以便释放连接相应的 socket 内存开销。reset_timedout_connection on; # send the client a "request timed out" if the body is not loaded by this time. Default 60.# 配置客户端数据请求超时时间，默认是 60 秒。client_body_timeout 10; # If the client stops reading data, free up the stale client connection after this much time. Default 60.# 客户端数据读超时配置，客户端停止读取数据，超时时间后断开相应连接，默认是 60 秒。send_timeout 2; # Compression. Reduces the amount of data that needs to be transferred over the network# 压缩参数配置，减少在网络上所传输的数据量。gzip on;gzip_min_length 10240;gzip_proxied expired no-cache no-store private auth;gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml;gzip_disable "MSIE [1-6].";