It's a planned feature see (http://trac.nginx.org/nginx/roadmap)
But it has no ETA.

Kurt Cancemi
https://www.x64architecture.com

> On Jan 31, 2015, at 11:25 PM, nginxuser100 <nginx-forum@nginx.us> wrote:
>
> Hi, how can tell nginx not to buffer client's requests? I need this
> capability to upload files larger than the nginx's max buffering size. I got
> an nginx unknown directive error when I tried the fastcgi_request_buffering
> directive. Is the directive supported and I am missing a module in my nginx
> build? I am running nginx 1.7.9. Thank you!
>
> Posted at Nginx Forum: http://forum.nginx.org/read.php?2,256378,256378#msg-256378
>
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