Nginx 0.8.54 serves as a reverse SSL proxy to Apache.
Web application being served is used in this way - we upload multiple text files, process them and re-direct user to a page displaying processed results.
On uploading files the re-direct starts but then a web browser freezes for a few seconds (eventually coming back to life). After that the re-direct successfully completes.
Since there is no problem of this kind when going directly through Apache the bottleneck must be in Nginx's proxy settings.
I've looked here http://wiki.nginx.org/HttpProxyModule and here http://wiki.nginx.org/HttpCoreModule#client_max_body_size.
Could you, guys, help to pinpoint which of the settings need adjusting to prevent browsers from freezing?