Connection statuses

K Young k at datadoghq.com
Thu Feb 19 20:46:46 UTC 2015


In nginx Open, it looks like when a connection can't be assigned to a
request, it is dropped and not enqueued for later processing. Is this
correct? If so is the number of dropped connections equal to the difference
between active and handled?

On Thu, Feb 19, 2015 at 10:34 AM, Valentin V. Bartenev <vbart at nginx.com>
wrote:

> On Thursday 19 February 2015 10:12:02 K Young wrote:
> > Thanks Maxim, that's what I needed to know.
> >
> > How common would you say it is to use accept filters / deferred accept on
> > nginx in production?
> >
> > Also to be perfectly certain: connections.idle
> > <http://nginx.org/en/docs/http/ngx_http_status_module.html#data> in
> Plus is
> > the same as Waiting
> > <http://nginx.org/en/docs/http/ngx_http_stub_status_module.html#data> in
> > Open, right?
>
> Yes, right.
>
>
> >
> > Is "Active" on the status demo <http://demo.nginx.com/status.html> =
> > read+write?
>
> No.  It's "active" minus "idle" (i.e. waiting).
>
> "Read + write" can be bigger than the number of connections in case of
> SPDY.
> I prefer calling them as the requests metrics despite of the stub status
> point of view.  This sum actually is requests.current in the status module.
>
> http://demo.nginx.com/status/requests/current
>
>   wbr, Valentin V. Bartenev
>
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