Proxy immediately

Hello,

Is there a chance to pass a large POST-request immediately to the
upstream?
The POST-request is cached by nginx. The Upstream starts parsing the
request
as soon as the request is fully uploaded.
It is impossible to parse a large POST-request within a couple of
seconds.

Thanks a lot
Marcus

Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,235508,235508#msg-235508