Weird timeouts, not sure if I've set the right threshholds

[Igor Sysoev]

On Wed, Apr 30, 2008 at 10:53:59PM -0700, mike wrote:

> yeah, i issued the request manually, there is no PHP there.

What do you mean by manually ?

> that could have been a client timeout or something for all i know. i
> am sure with a few million requests per day there will be a handful of
> crappy connections, proxies, tor exit nodes changing, etc...

No, this are timeout errors between nginx and its backend.

> On 4/30/08, Igor Sysoev <is at rambler-co.ru> wrote:
> > On Wed, Apr 30, 2008 at 10:26:16PM -0700, mike wrote:
> >
> > > On the proxy. I've changed the IPs and hostnames to protect the
> > > innocent (except for the upstream IPs - which are the 10.13.5.x ones)
> > >
> > > 2008/04/30 22:02:44 [error] 24799#0: *77643721 upstream timed out
> > > (110: Connection timed out) while reading upstream, client:
> > > 21.5.4.247, server: lvs01.myhosting.net, request: "GET
> > > /gallery/videos/FLV_LG/ics2.flv HTTP/1.1", upstream:
> > > "http://10.13.5.14:80/gallery/videos/FLV_LG/ics2.flv", host:
> > > "media.clientdomain.net", referrer:
> > > "http://clientdomain.net/images/tempVid_lg.swf"
> > >
> > > 2008/04/30 22:04:45 [error] 24801#0: *77661724 upstream timed out
> > > (110: Connection timed out) while reading response header from
> > > upstream, client: 12.107.23.215, server: lvs01.myhosting.net, request:
> > > "GET /forum/aus-classifieds/171768-e46-sub-box-2-x-r-f-p2-subs.html
> > > HTTP/1.1", upstream:
> > > "http://10.13.5.14:80/forum/aus-classifieds/171768-e46-sub-box-2-x-r-f-p2-subs.html",
> > > host: "www.clientdomain.net", referrer:
> > > "http://images.google.com/imgres?imgurl=http://memimage.cardomain.net/member_images/12/web/2124000-2124999/2124693_10_full.jpg&imgrefurl=http://www.clientdomain.net/forum/aus-classifieds/171768-e46-sub-box-2-x-r-f-p2-subs.html&start=100&h=431&w=575&sz=170&tbnid=vF8z4lznXJyOxM:&tbnh=100&tbnw=134&hl=en&prev=/images%3Fq%3De46%26start%3D80%26imgsz%3Dlarge%257Cxlarge%257Cxxlarge%257Chuge%26gbv%3D1%26hl%3Den%26sa%3DN"
> > >
> > > 2008/04/30 22:08:18 [error] 24798#0: *77681622 upstream timed out
> > > (110: Connection timed out) while reading response header from
> > > upstream, client: 66.29.2.76, server: lvs01.myhosting.net, request:
> > > "GET /forum/general-discussion/117997-how-hard-repaint-car.html
> > > HTTP/1.1", upstream:
> > > "http://10.13.5.10:80/forum/general-discussion/117997-how-hard-repaint-car.html",
> > > host: "www.clientdomain.net"
> >
> > The first line is error in the middle of ics2.flv transfer.
> > The last two are did not get responses at all: "while reading response header".
> > I think these two are handled by PHP and it may be slow.
> > But the first timeout of static FLV is strange. Are you show that it handled
> > by nginx but not PHP ?
> >
> > > i'm not actually seeing anything for that request in the backend error
> > > log. sometimes i see "client aborted connection" etc. but i enabled
> > > the "fastcgi_ignore_client_abort on;" on the backend, and
> > > "proxy_ignore_client_abort on;" on the proxy...
> > >
> > >
> > > On 4/30/08, Igor Sysoev <is at rambler-co.ru> wrote:
> > > > On Wed, Apr 30, 2008 at 10:07:59PM -0700, mike wrote:
> > > >
> > > > > On 4/30/08, Igor Sysoev <is at rambler-co.ru> wrote:
> > > > >
> > > > > > The timeout errors has no relation to buffers. These errors usually
> > > > > > means that backends are too slow.
> > > > >
> > > > > What should I look at then to speed them up?
> > > > >
> > > > > The backends are Linux, NFS server is FBSD7, proxy server is Linux.
> > > > > Any pointers are appreciated.
> > > >
> > > > Could you show some timeout messages ?
> > > >
> > > >
> > > > --
> > > > Igor Sysoev
> > > > http://sysoev.ru/en/
> > > >
> > > >
> >
> > --
> > Igor Sysoev
> > http://sysoev.ru/en/
> >
> >

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