How to get rid of: "an upstream response is buffered to a temporary file"?

Question

Nginx

Hello.
The following errors appear in the logs: "var/www/httpd-logs/": an upstream response is buffered to a temporary file . Errors appear when a user downloads an attachment from posts. As I understand it, the buffer does not have enough space to fit the file.
Inserted the following lines into the config:

fastcgi_buffering            on;
  fastcgi_buffer_size          512m;
  fastcgi_buffers              8 512m; 
  fastcgi_busy_buffers_size    512m; 
  fastcgi_temp_file_write_size 512m;

Did not help. "512m" - this increased the volume, started from "512k". I inserted the main config into the site config, it doesn't help... It only helps: But it seems to me that this is completely wrong... Tell me, what and where should be inserted to correct the error? Thank you.
proxy_max_temp_file_size 0;

Answer 1

This is not an error, it's just that the file did not fit into memory, and a temporary file was used, it makes no sense to twist the settings for large files, because it does not matter (on the contrary, performance may drop)