Confused about proxy_buffer_size and proxy_buffers

[Kiril Angov]

A little of topic but you definitely should implement some pagination
for the comments.

Kiril

On Wed, Apr 30, 2008 at 1:15 AM, Igor Sysoev <is at rambler-co.ru> wrote:
>
> On Wed, Apr 30, 2008 at 11:15:14AM +1000, Dave Cheney wrote:
>
>  > Hi,
>  >
>  >       I am trying to tune our nginx frontends (proxying a pack of
>  >       mongrels)  to avoid this type of message
>  >
>  > 2008/04/30 11:06:50 [warn] 35585#0: *40967931 an upstream response is
>  > buffered to a temporary file /opt/local/var/run/nginx/proxy_temp/
>  > 0/58/0000370580 while reading upstream, client: 202.129.81.166,
>  > server: www.redbubble.com, request: "GET /people/basiamc/art/732916-4-
>  > fire-fairy? HTTP/1.0", upstream:
>  > "http://172.16.0.76:8006/people/basiamc/art/732916-4-fire-fairy ", host:
>  > "www.redbubble.com", referrer:
>  > "http://www.redbubble.com/people/basiamc/art/732916-4-fire-fairy "
>  >
>  >       A little bit of curling reveals that our minimum page size is
>  >       between  11k and 14k, but can be up to 35k for the common pages. So I have
>  > set
>  >
>  >       proxy_buffer_size 32k
>  >
>  >       In the expectation that this buffer will be allocated for all proxy
>  > requests before the overflow into proxy_buffers.
>  >
>  >       For pages that have a large number of comments the sizes can range
>  >       up  to 150k but even with a setting like this
>  >
>  >       proxy_buffers 128       4k;
>  >
>  >       which should yield a maximum buffer of 546k, this request
>  >
>  > [dave at crimson ~]$ curl -I
>  > http://www.redbubble.com/people/basiamc/art/732916-4-fire-fairy
>  > HTTP/1.1 200 OK
>  > Server: nginx
>  > Date: Wed, 30 Apr 2008 01:13:45 GMT
>  > Content-Type: text/html; charset=utf-8
>  > Connection: keep-alive
>  > Set-Cookie: _session_id=1263f18e47b978d84cab76592cf240c4; path=/
>  > Cache-Control: private, max-age=0, must-revalidate
>  > Content-Length: 282541
>  >
>  >       Generates a warning.
>  >
>  >       Should I continue to increase the buffer size? Should I allocate the
>  > buffer in larger sizes? Is there an interaction with proxy_buffers and
>  > gzip or the output buffer settings ?
>
>  No, these buffers should be enough.
>  Are you sure that nginx was successfully reconfigured ?
>  Is nginx -t OK ?
>
>  Could you create debug log of the sinlge connection ?
>
>  BTW I think that
>    proxy_buffer_size  16k;
>    proxy_buffers      32   16k;
>
>
>  --
>  Igor Sysoev
>  http://sysoev.ru/en/
>
>