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Re: Trying to Understand Upstream Keepalive

October 29, 2014 01:15PM
Maxim Dounin Wrote:
-------------------------------------------------------
> Hello!
>
> On Tue, Oct 28, 2014 at 08:01:33PM -0400, newnovice wrote:
>
> > Maxim,
> >
> >
> http://nginx.org/en/docs/http/ngx_http_upstream_module.html#keepalive
> >
> > I would like to know what is the keepalive timeout for this
> connection pool?
> > Is it static?
>
> As of now, there is no timeout on nginx side. Connections are
> closed either by backends or if there isn't enough room in
> the cache.

So how long after a connection to upstream goes from ACTIVE to idle in the connection pool does it get closed?
There is not really much documentation on this upstream keepalive component.

>
> > Also i want to understand - if there is a marriage between number of
> > connections nginx gets vs how many it opens to upstream?
>
> This depends on how long it takes to process a request (as well as
> various other factors). As long as backends are fast enough, one
> connection to upstream may be enough to handle tens or hundreds of
> client connections.

Ok.
What is the difference between 'max_conns' vs http://nginx.org/en/docs/http/ngx_http_limit_conn_module.html#limit_conn to an upstream service ?

>
> --
> Maxim Dounin
> http://nginx.org/
>
> _______________________________________________
> nginx mailing list
> nginx@nginx.org
> http://mailman.nginx.org/mailman/listinfo/nginx
Subject Author Posted

Trying to Understand Upstream Keepalive

abstein2 May 08, 2014 01:34AM

Re: Trying to Understand Upstream Keepalive

Maxim Dounin May 08, 2014 10:08PM

Re: Trying to Understand Upstream Keepalive

newnovice October 28, 2014 08:01PM

Re: Trying to Understand Upstream Keepalive

Maxim Dounin October 29, 2014 12:32PM

Re: Trying to Understand Upstream Keepalive

newnovice October 29, 2014 01:15PM

Re: Trying to Understand Upstream Keepalive

Maxim Dounin October 29, 2014 01:54PM

Re: Trying to Understand Upstream Keepalive

newnovice October 29, 2014 02:20PM

Re: Trying to Understand Upstream Keepalive

Maxim Dounin October 29, 2014 04:16PM

Re: Trying to Understand Upstream Keepalive

aanchalj June 14, 2016 04:09AM

Re: Trying to Understand Upstream Keepalive

Valentin V. Bartenev June 14, 2016 08:14AM



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