Tweaking FastCGI buffers settings

[rahul286]

>Yes, a whole 32M response will be in memory, however, I do not think that
>is right thing. You should handle the most responses in memory and allow
>to use disk for biggest ones:
I guess as of now nginx is doing this only.
I guess its safe to ignore warnings in error_log. 
In optimal case, I will find less number of warnings i.e. " upstream response is buffered to a temporary file /var/lib/nginx/fastcgi/" messages.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,25728,25891#msg-25891