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Re: Strange requests stalling inside nginx

February 13, 2017 07:15AM
Maxim Dounin Wrote:
-------------------------------------------------------
> Hello!
>
> On Sat, Feb 11, 2017 at 04:06:29PM -0500, MichaelLogutov wrote:
>
> > Hello.
> > We have some strange issues when requests seems to stall inside
> nginx - in
> > nginx log we see that request took 1 second (and was terminated by
> client
> > timeout), while excactly the same request (we have special unique
> headers to
> > mark them) from the uwsgi logs took only 100ms to complete.
>
> It is not clear how do you measure that request took 1 second.
> Note well that request time as seen by nginx is unlikely to be
> less that the time seen by your backend, but can easily be much
> longer: for example, nginx has to read the request from client,
> and it sometimes takes significant time.
>
> > We also saw some very strange pauses in nginx debug log:
>
> [...]
>
> I don't see any "strange pauses" in the logs provided. If you
> think there are any - please elaborate.
>
> Note well that it's almost impossible to analize debug logs for
> pauses if these logs doesn't contain information about processing
> of events. To make sure all needed information is present it is
> important to configure debug logs at global level, as recommended
> at http://nginx.org/en/docs/debugging_log.html.
>
> --
> Maxim Dounin
> http://nginx.org/
> _______________________________________________
> nginx mailing list
> nginx@nginx.org
> http://mailman.nginx.org/mailman/listinfo/nginx


Thank you.
I was talking about 3 seconds gap here:

2017/01/26 20:17:51 [debug] 2749#0: *75780960 http upstream recv(): -1 (11: Resource temporarily unavailable)
2017/01/26 20:17:54 [debug] 2749#0: *75780960 http upstream request: "/api/info/account/type/278933/?"
Subject Author Posted

Strange requests stalling inside nginx

MichaelLogutov February 11, 2017 04:06PM

Re: Strange requests stalling inside nginx

Maxim Dounin February 12, 2017 10:00AM

Re: Strange requests stalling inside nginx

MichaelLogutov February 13, 2017 07:15AM

Re: Strange requests stalling inside nginx

Maxim Dounin February 13, 2017 07:40AM



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