How to set up buffering for nginx proxy server?

In nginx, proxy buffers can be configured using the following settings.

1. proxy_buffering: Used to enable or disable proxy buffering, default is enabled. Can be set to on or off.
2. proxy_buffers: used to determine the size and quantity of proxy buffers. Multiple values can be set, with each value containing two parameters – the size of each buffer and the number of buffers. For example, “proxy_buffers 8 16k;” means each buffer is 16k in size, with a total of 8 buffers.
3. proxy_buffer_size is used to set the size of each buffer, with the default being 4k. It can be adjusted based on actual needs.
4. proxy_busy_buffer_size: This parameter specifies the size of additional buffer used to temporarily store responses when all buffers are in use. The default size is 8k.
5. proxy_max_temp_file_size: This is used to determine the maximum file size for when the response exceeds this value, Nginx will write temporary files to disk instead of buffering. The default is 0, meaning responses will not be written to disk.

These configurations can be set within the http, server, or location blocks in nginx to enable setting the proxy buffers for different scenarios. The methods for setting are as follows:

http {
    ...
    proxy_buffering on;
    proxy_buffers 8 16k;
    proxy_buffer_size 4k;
    proxy_busy_buffers_size 8k;
    proxy_max_temp_file_size 0;
    ...
}

It is important to adjust the settings of the proxy buffer according to the actual situation to balance the use of memory and performance needs.