Upstream least_conn behavior irregularity

John Watson john at disqus.com
Thu Mar 21 16:34:19 UTC 2013


Ohhhh... that makes complete sense now.

Had 4 workers.

Thanks!


On Thu, Mar 21, 2013 at 4:47 AM, Ruslan Ermilov <ru at nginx.com> wrote:

> On Thu, Mar 21, 2013 at 01:45:14AM -0700, John Watson wrote:
> >    Was investigating some issues today when we noticed that least_conn
> wasn't
> >    behaving as expected.
> >    upstream backend {
> >      least_conn;
> >      server unix:/tmp/sock-1.sock;
> >      server unix:/tmp/sock-2.sock;
> >      server unix:/tmp/sock-3.sock;
> >    }
> >    The expected behavior for 4 simultaneous requests it should distribute
> >    them:
> >    sock-1: 2
> >    sock-2: 1
> >    sock-3: 1
> >    However, what we're seeing is:
> >    sock-1: 3
> >    sock-2: 1
> >    sock-3: 0
> >    Which coincidentally lines up with the number of requests a socket can
> >    service simultaneously.
> >    This is using 1.2.7
>
> And the number of configured worker processes is?
>
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