網(wǎng)頁無法訪問此網(wǎng)站，后跳轉(zhuǎn)到新頁面

1.公司開發(fā)項目線上測試，點(diǎn)擊某個頁面時，先顯示網(wǎng)頁無法顯示，然后跳轉(zhuǎn)到目標(biāo)頁面，大約1.5秒
測試服務(wù)器使用的nginx，百度了相關(guān)問題，沒有找到有效的辦法，已經(jīng)出現(xiàn)了有一個星期，以前沒有出現(xiàn)過
圖片掛掉了，錯誤代碼err_socket_not_connected,所有測試瀏覽器都會出錯
如圖

nginx配置如下: 192.168.20.53為主服務(wù)器

user www www;
worker_processes auto;

error_log /data/wwwlogs/error_nginx.log crit;
pid /var/run/nginx.pid;
worker_rlimit_nofile 51200;

events {

use epoll;
worker_connections 51200;
multi_accept on;
}

http {

include mime.types;
default_type application/octet-stream;
server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
client_max_body_size 1024m;
sendfile on;
tcp_nopush on;
keepalive_timeout 60;
server_tokens off;
tcp_nodelay on;

fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
fastcgi_buffer_size 64k;
fastcgi_buffers 4 64k;
fastcgi_busy_buffers_size 128k;
fastcgi_temp_file_write_size 128k;

#Gzip Compression
gzip on;
gzip_buffers 16 8k;
gzip_comp_level 6;
gzip_http_version 1.1;
gzip_min_length 256;
gzip_proxied any;
gzip_vary on;
gzip_types
    text/xml application/xml application/atom+xml application/rss+xml application/xhtml+xml image/svg+xml
    text/javascript application/javascript application/x-javascript
    text/x-json application/json application/x-web-app-manifest+json
    text/css text/plain text/x-component
    font/opentype application/x-font-ttf application/vnd.ms-fontobject
    image/x-icon;
gzip_disable "MSIE [1-6]\.(?!.*SV1)";

#If you have a lot of static files to serve through Nginx then caching of the files' metadata (not the actual files' contents) can save some latency.
open_file_cache max=1000 inactive=20s;
open_file_cache_valid 30s;
open_file_cache_min_uses 2;
open_file_cache_errors on;

default

upstream webserver
{
server 192.168.20.51:80;
server 192.168.20.52:80;
server 192.168.20.53:80;
}
server {

listen 80;
server_name _;
access_log /data/wwwlogs/access_nginx.log combined;
root /data/wwwroot/default;
index index.html index.htm index.php;

if (!-e $request_filename)
{
    rewrite ^/(mall|admin|circle|microshop|cms)/(.*)html$ /$1/index.php?$2;
}

location /nginx_status {
    stub_status on;
    access_log off;
    allow 127.0.0.1;
    deny all;

proxy_pass http://webserver;

    }
location ~ [^/]\.php(/|$) {
    #fastcgi_pass remote_php_ip:9000;
    fastcgi_pass unix:/dev/shm/php-cgi.sock;
    fastcgi_index index.php;
    include fastcgi.conf;

    fastcgi_param PATH_INFO $request_uri;

    }
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|flv|ico)$ {
    expires 30d;
    access_log off;
    }
location ~ .*\.(js|css)?$ {
    expires 7d;
    access_log off;
    }

}