Proxy_buffer_size values are honored even if proxy_buffering is off

At the
http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_buffer_size,
the documentation implies that
the configuration proxy_buffer_size , proxy_buffers and
proxy_busy_buffers will be honored only when proxy_buffering is turned
on.

I had been seeing truncated responses of files which went away when I
increased proxy_buffer_size even though proxy_buffering was turned off.
I am running nginx1.5.8. Is this expected behavior ?

Thanks for any answers.

Hello!

On Mon, May 05, 2014 at 03:04:22AM +0800, Rv Rv wrote:

At the
http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_buffer_size, the
documentation implies that
the configuration proxy_buffer_size , proxy_buffers and proxy_busy_buffers will
be honored only when proxy_buffering is turned on.

The “proxy_buffering off” implies that response will not be
buffered - that is, everything received from a backend is
immediately sent to a client.

At least one buffer is still required though (nginx have to store
data from a backend somewhere before it will be able to send them
to a client), and proxy_buffer_size defines size of this buffer.

See http://nginx.org/r/proxy_buffering for details.

I had been seeing truncated responses of files which went away
when I increased proxy_buffer_size even though proxy_buffering
was turned off. I am running nginx1.5.8. Is this expected
behavior ?

No, it’s not.

First of all, I would recommend you to take a look into error
logs - it might have an answer.

If it doesn’t help, some more debugging hints can be found at
http://wiki.nginx.org/Debugging.


Maxim D.
http://nginx.org/

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