Is that for multiple servers? Nginx is the only webserver on this box...
it's nginx, xcach, php-fmp, php, and mysql.

-----Original Message-----
From: owner-nginx@sysoev.ru [mailto:owner-nginx@sysoev.ru] On Behalf Of Igor
Sysoev
Sent: Tuesday, April 21, 2009 3:35 PM
To: nginx@sysoev.ru
Subject: Re: Logs Assistance

On Tue, Apr 21, 2009 at 12:30:57PM -0500, AMP Admin wrote:

> I see a lot of the following in our log. Anyone know what might be
causing this?
>
> [info] 15399#0: *15062 client *.*.*.* closed keepalive connection (104:
Connection reset by peer)

MSIE has closed a keepalive connection (this is normal).

> [info] 15401#0: *15199 client *.*.*.* closed keepalive connection

A browser has closed a keepalive connection (this is normal).

> [warn] 15399#0: *14910 an upstream response is buffered to a temporary
file /tmp/fastcgi/7/07/0000000077 while reading upstream, client: *.*.*.*,
request: "GET /page.php?e=29306 HTTP/1.0", upstream:
"fastcgi://127.0.0.1:9000", referrer: "http://forum.forum.com/page2.php?g=5"

Probably you need to increase

http://wiki.nginx.org/NginxHttpProxyModule#proxy_buffer_size
and
http://wiki.nginx.org/NginxHttpProxyModule#proxy_buffers


--
Igor Sysoev
http://sysoev.ru/en/