nginx caching proxy

[drookie]

Hello, 

I did't find the answer in documentation, but am I right, assuming from my
observation, that when the proxy_cache is enabled for a location, and the
client requests the file that isn't in the cache yet, nginx starts
transmitting this file only after it's fully received from the upstream ?
Because I'm seeing the lags equal to the request_time from the upstream.

If I'm right, is there a way to enable the transmitting without waiting for
the end of the file ?

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,281621,281621#msg-281621