495884965

http://weizhifeng.net/nginx-proxy-cache.html
很棒的解說
Nginx效能解析

以apache為後端，Nginx為前端
Nginx將頁面圖片cache在本機來回應

#vi /etc/nginx/sites-available/default

server {
   :
   :
   location / {
     # First attempt to serve request as file, then
     # as directory, then fall back to index.html
     #try_files $uri $uri/ /index.html;
     # Uncomment to enable naxsi on this location
     # include /etc/nginx/naxsi.rules
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $remote_addr;
     proxy_set_header Host $host;
     proxy_pass http://192.168.1.168;
     proxy_cache tmpcache;
     proxy_cache_key "$scheme$request_method$host$request_uri";
     proxy_cache_valid 200 304 1m;
     //後端回應http_status_code 200和304的
     //保留一分鐘
     proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504 http_404;
     //後端出問題時，以cache資料回應
     #proxy_cache_revalidate on;

     }
   :
   :
}

#vi /etc/nginx/nginx.conf

http {
   :
   :
     ##
     # page cache
     ##
     proxy_cache_path /tmp/nginx/cache levels=1:2 keys_zone=tmpcache:5m max_size=100m;
     #proxy_temp_path /tmp/nginx/tmp 1 2; #option
     include /etc/nginx/conf.d/*.conf;
     include /etc/nginx/sites-enabled/*;
}


#mkdir -p /tmp/nginx/cache
#mkdir -p /tmp/nginx/tmp
#service nginx restart

可以去比較前端Nginx與後端Apache的access.log