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It is very common to see a 504 Gateway Time-out using Nginx webserver. This timeout error is generated often by a number of reasons on the backend connection that is serving content. To fix it, you will have to figure out what configuration are you using.


For Nginx + FastCGI (php-fpm), you should try to tweak nginx configuration in this way-:

Try raising max_execution_time setting in php.ini file (CentOS path is /etc/php.ini):

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max_execution_time = 300

But, you should also change set request_terminate_timeout parameter (commented by default) at http://www.conf file from PHP-FPM:

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pico -w /etc/php-fpm.d/www.conf

Then set the variable to the same value as max_execution_time:

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request_terminate_timeout = 300

Now let’s add fastcgi_read_timeout variable inside our Nginx virtual host configuration:

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location ~ .php$ {
root /var/www/sites/nginxtips.com;
try_files $uri =404;
fastcgi_pass unix:/tmp/php5-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;
fastcgi_read_timeout 300;
}

Then restart nginx:

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service nginx restart

For Nginx as Proxy for Apache web server, this is what you have to try:

Add this variables to nginx.conf file:

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proxy_connect_timeout       600;
 proxy_send_timeout          600;
 proxy_read_timeout          600;
 send_timeout                600;

Then restart nginx:

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service nginx restart