How to solve php504 error

Solution to php504 error: 1. Increase the buffer size of the fastcgi process response; 2. Change the php environment configuration and increase the timeout of the php-cgi process processing script; 3. Change the processing method of php-fpm Change to apache mode.

The solution is as follows:

Scenario 1:

Due to the buffer response of nginx’s default fastcgi process Error caused by being too small

Solution:

Generally, the default fastcgi process response buffer is 8K. In this case, you can set it larger. In nginx.conf, add: fastcgi_buffers 8 128k, which means setting the fastcgi buffer to 8 blocks of 128k space.

Of course, if you are performing a certain real-time operation, you may need to increase the timeout parameter of nginx, for example, set it to 60 seconds: send_timeout 60; after adjusting these two parameters, generally you will no longer be prompted with " 504 Gateway Time-out" error, the problem is basically solved.

Scenario 2:

Configuration issues of PHP environment

Sometimes the website needs to modify the configuration of php-fpm and nginx. Because in this case, the "504 Gateway Time-out" error message will also appear. At this time, the meaning of Nginx 504 Gateway Time-out is that the requested gateway has not been requested. Simply put, it means that the executable PHP-CGI has not been requested.

Solution:

Just change a few configurations of php-fpm:

Change max_children from the previous 10 to the current 30, so as to ensure that there are enough The php-cgi process can be used;

Change request_terminate_timeout from the previous 0s to 60s, so that the timeout time for the php-cgi process to process the script is 60 seconds, which can prevent the process from being suspended and improve utilization efficiency. .

Then change several configuration items of nginx to reduce the number of FastCGI requests and try to keep the buffers unchanged:

fastcgi_buffers is changed from 4 64k to 2 256k;

fastcgi_buffer_size Changed from 64k to 128K;

fastcgi_busy_buffers_size changed from 128K to 256K;

fastcgi_temp_file_write_size changed from 128K to 256K.

Reload the configuration of php-fpm and nginx and test again. If the "504 Gateway Time-out" error does not appear, the problem is solved.

Scenario 3:

The default static processing method of php-fpm will cause the php-cgi process to occupy memory for a long time and cannot be released, resulting in a 504 error.

Solution:

Change the processing method of php-fpm to apache mode.

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