2015/07/03 17:38:51 [error] 4283#0: *74154 connect() to unix:/var/run/php5-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream, client: 173.245.xx.xx, server: www.mydomain.com, request: "GET /path/to/file HTTP/1.1", upstream: "fastcgi://unix:/var/run/php5-fpm.sock:

total       used       free     shared    buffers     cached
Mem:           15G        15G       248M        71M       1.3G        11G
-/+ buffers/cache:       2.3G        13G
Swap:           0B         0B         0B

user www-data;
worker_processes 8;
pid /run/nginx.pid;

events {
    worker_connections  16192;
    multi_accept        on;
    use                 epoll;
}

http {
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 15;
    types_hash_max_size 2048;
    include /etc/nginx/mime.types;
    default_type application/octet-stream;
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;
    gzip on;
    gzip_disable "msie6";
    include /etc/nginx/conf.d/*.conf;
    include /etc/nginx/sites-enabled/*;
}

fastcgi_cache_key "$host$request_uri";
fastcgi_cache_use_stale error timeout invalid_header http_500;
fastcgi_ignore_headers Cache-Control Expires Set-Cookie;

server {
    listen 80 default_server;
    listen [::]:80 default_server ipv6only=on;
    listen 127.0.0.1 default_server;

    root /usr/share/nginx/html;
    index index.php index.html index.htm;

    server_name my.website.com;
    server_name localhost;

    location / {
        try_files $uri $uri/ =404;
    }

    error_page 404 /404.html;
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }

    location ~ .php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+.php)(/.+)$;
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;

    }
    location ~ .php$ {
        fastcgi_split_path_info ^(.+.php)(/.+)$;
        fastcgi_pass unix:/var/run/php5-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;
    }

}