[Pdns-users] Help with mydns backend

[Rob Campbell]

Hi,

max_connections is set to 500 and we're not hitting it.

Thanks,
Rob.

On Fri, 8 Feb 2019 at 08:52, Otto Moerbeek <otto at drijf.net> wrote:

> On Thu, Feb 07, 2019 at 05:11:57PM +0000, Rob Campbell wrote:
>
> > Hi,
> >
> > I'm trying to switch from mydns-ng to powerdns 4.1.6 with the mydns
> > backend. It seems to be working fine on my quietest nameserver but on a
> > busy one it starts returning REFUSED to queries after a few minutes and I
> > can't work out why as it's not logging any errors. I tried setting
> > loglevel=6 and still didn't get anything logged. How can I get some logs
> > showing why it's returning REFUSED?
> > Seems like we ramp up to over 70 TCP connections quite quickly and we're
> > fine at first but once we hit that many either the backend can't keep up
> or
> > we're hitting some limit I've not found.
>
> Try checking the mysql max_connections parameter. That is a parameter
> that can be set in the my.cnf config file and runtime as well iirc.
> Mysql will normally log an error if the max connection limit is hit.
> Where it logs is depedendent on its configuration.
>
>
> https://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html#sysvar_max_connections
>
> Replace the version with your particular mysql version.
>
> I do not know how many mysql connections the mydns backend is supposed
> to use. If increasing the limit does not work out, we can investiate
> further.
>
> Migration to the gmysql backend is a good thing, considering the
> limited features of the mydns backend.
>
>         -Otto
>
> >
> > Config is:
> >
> > launch=
> > security-poll-suffix=
> > server-id=
> > include-dir=/etc/powerdns/pdns.d
> > setgid=pdns
> > setuid=pdns
> > version-string=anonymous
> > max-tcp-connections=1024
> > receiver-threads=8
> > reuseport=yes
> > cache-ttl=60
> > loglevel=6
> > launch+=mydns
> > mydns-soa-active=no
> > mydns-rr-active=no
> >
> > Can anyone help me work out why it's refusing queries?
> >
> > Kind regards,
> > Rob Campbell.
>
> > _______________________________________________
> > Pdns-users mailing list
> > Pdns-users at mailman.powerdns.com
> > https://mailman.powerdns.com/mailman/listinfo/pdns-users
>
>
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