yum -y install nginx

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.)
# 這里的數(shù)值不能超過 CPU 的總核數(shù)，因?yàn)樵趩蝹€(gè)核上部署超過 1 個(gè) Nginx 服務(wù)進(jìn)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數(shù)量，同時(shí)需要配置操作系統(tǒng)的 "ulimit -n 200000"，或者在 /etc/security/limits.conf 中配置。 
worker_rlimit_nofile 200000;
 
# only log critical errors
# 只記錄 critical 級(jí)別的錯(cuò)誤日志
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)
# 配置單個(gè) Nginx 單個(gè)進(jìn)程可服務(wù)的客戶端數(shù)量，（最大值客戶端數(shù) = 單進(jìn)程連接數(shù) * 進(jìn)程數(shù) ）
# 最大客戶端數(shù)同時(shí)也受操作系統(tǒng) socket 連接數(shù)的影響（最大 64K ）
worker_connections 4000;
 
# essential for linux, optmized to serve many clients with each thread
# Linux 關(guān)鍵配置，允許單個(gè)線程處理多個(gè)客戶端請求。
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.
# 允許盡可能地處理更多的連接數(shù)，如果 worker_connections 配置太低，會(huì)產(chǎn)生大量的無效連接請求。
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.
# 緩存高頻操作文件的FDs（文件描述符/文件句柄）
# 在我的設(shè)備環(huán)境中，通過修改以下配置，性能從 560k 請求/秒 提升到 904k 請求/秒。
# 我建議你對(duì)以下配置嘗試不同的組合，而不是直接使用這幾個(gè)數(shù)據(jù)。
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
# 將日志寫入高速 IO 存儲(chǔ)設(shè)備，或者直接關(guān)閉日志。
# 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.
# 開啟 sendfile 選項(xiàng)，使用內(nèi)核的 FD 文件傳輸功能，這個(gè)比在用戶態(tài)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.
# 打開 tcp_nopush 選項(xiàng)，Nginux 允許將 HTTP 應(yīng)答首部與數(shù)據(jù)內(nèi)容在同一個(gè)報(bào)文中發(fā)出。
# 這個(gè)選項(xiàng)使服務(wù)器在 sendfile 時(shí)可以提前準(zhǔn)備 HTTP 首部，能夠達(dá)到優(yōu)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.
# 不要緩存 data-sends （關(guān)閉 Nagle 算法），這個(gè)能夠提高高頻發(fā)送小數(shù)據(jù)報(bào)文的實(shí)時(shí)性。
tcp_nodelay on;
 
# Timeout for keep-alive connections. Server will close connections after this time.
# 配置連接 keep-alive 超時(shí)時(shí)間，服務(wù)器將在超時(shí)之后關(guān)閉相應(yīng)的連接。
keepalive_timeout 30;
 
# Number of requests a client can make over the keep-alive connection. This is set high for testing.
# 單個(gè)客戶端在 keep-alive 連接上可以發(fā)送的請求數(shù)量，在測試環(huán)境中，需要配置個(gè)比較大的值。
keepalive_requests 100000;
 
# allow the server to close the connection after a client stops responding. Frees up socket-associated memory.
# 允許服務(wù)器在客戶端停止發(fā)送應(yīng)答之后關(guān)閉連接，以便釋放連接相應(yīng)的 socket 內(nèi)存開銷。
reset_timedout_connection on;
 
# send the client a "request timed out" if the body is not loaded by this time. Default 60.
# 配置客戶端數(shù)據(jù)請求超時(shí)時(shí)間，默認(rèn)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.
# 客戶端數(shù)據(jù)讀超時(shí)配置，客戶端停止讀取數(shù)據(jù)，超時(shí)時(shí)間后斷開相應(yīng)連接，默認(rèn)是 60 秒。
send_timeout 2;
 
# Compression. Reduces the amount of data that needs to be transferred over the network
# 壓縮參數(shù)配置，減少在網(wǎng)絡(luò)上所傳輸?shù)臄?shù)據(jù)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].";

service nginx start
  chkconfig nginx on

[root@loadnode1 ~] vim ~/.tsung/tsung.xml

   <server host="YOURWEBSERVER" port="80" type="tcp"/>

tsung start

yum -y install netperf iperf
vim /etc/sysctl.conf

# Increase system IP port limits to allow for more connections
# 調(diào)高系統(tǒng)的 IP 以及端口數(shù)據(jù)限制，從可以接受更多的連接
net.ipv4.ip_local_port_range = 2000 65000
 
net.ipv4.tcp_window_scaling = 1
 
# number of packets to keep in backlog before the kernel starts dropping them
# 設(shè)置協(xié)議?？梢跃彺娴膱?bào)文數(shù)閥值，超過閥值的報(bào)文將被內(nèi)核丟棄
net.ipv4.tcp_max_syn_backlog = 3240000
 
# increase socket listen backlog
# 調(diào)高 socket 偵聽數(shù)閥值
net.core.somaxconn = 3240000
net.ipv4.tcp_max_tw_buckets = 1440000
 
# Increase TCP buffer sizes
# 調(diào)大 TCP 存儲(chǔ)大小
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216
net.ipv4.tcp_congestion_control = cubic

sysctl -p /etc/sysctl.conf

[root@web001 ~]# sysctl -a | grep fs.file

fs.file-max = 789972
fs.file-nr = 510 0 789972

[root@web001 ~]# getconf PAGESIZE

4096

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_timestamps = 0

net.ipv4.tcp_synack_retries = 1

net.ipv4.tcp_syn_retries = 1

net.ipv4.tcp_fin_timeout = 1

net.ipv4.tcp_keepalive_time = 30