nginx io瓶颈问题
目前我有几个站大概十几万ip，pv三四百万左右，之前是分成好几台iis服务器，由于网站大部分是生成的静态页面，考虑到nginx对静态页面的优秀的表现，所有就进行了更换，把前后台分离，后台用一台服务器安装server 2008 ii7，前台单独用一台 Dual Xeon E5410 16GB CentOS 6 x86_64 Nginx
worker_processes 8;
#worker_cpu_affinity auto;
worker_cpu_affinity 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000;
worker_rlimit_nofile 65535;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
use epoll;
worker_connections 20480;
}
http {
server_names_hash_bucket_size 512;
server_names_hash_max_size 512;
include mime.types;
default_type application/octet-stream;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
#access_log logs/access.log main;
sendfile on;
tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
tcp_nodelay on;
server_tokens off;
gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.1;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml;
gzip_vary on;
include vhost/*.conf;
listen 80;
server_name www.xxx.com *.xxx.com;
location / {
root /home/wwwroot/xxx.com;
error_page 404 /404.html;
error_page 500 502 503 504 /50x.html;
}
}
## Set the OS file cache. open_file_cache max=3000 inactive=120s; open_file_cache_valid 45s; open_file_cache_min_uses 2; open_file_cache_errors off;改完看看效果。
open_file_cache_valid 45s;
open_file_cache_min_uses 2;
open_file_cache_errors off;
把这个添加进去了，好像没多大用！另外我还参照网上的一些修改了些内核设置：
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.tcp_sack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_rmem = 4096 87380 4194304
net.ipv4.tcp_wmem = 4096 16384 4194304
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.core.netdev_max_backlog = 262144
net.core.somaxconn = 262144
net.ipv4.tcp_max_orphans = 3276800
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_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_mem = 94500000 915000000 927000000
net.ipv4.tcp_fin_timeout = 1
net.ipv4.tcp_keepalive_time = 30
net.ipv4.ip_local_port_range = 1024 65000
外加，把线程加大到24个线程，然后
worker_cpu_affinity 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000 00000001 00000010 00000100 00001000 00010000 00100000 01000000 10000000;
