Re: Questions on logical replication

> Have you looked at pg_upgrade?:

I have, but I want to keep downtime to a minimum and from my understanding
the switching of a fully synced logical replica only requires updating your
sequences. Which should be possible in less than 60 seconds.

> 1 GB each?

Yes, each. Roughly around there.

On Sat, Jun 8, 2024 at 7:46 PM Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
wrote:

> On 6/8/24 10:40, Koen De Groote wrote:
> > What I'm trying to do is upgrade a PG11 database to PG16, using logical
> > replication.
>
> Have you looked at pg_upgrade?:
>
> https://www.postgresql.org/docs/current/pgupgrade.html
>
> >
> > The PG11 has an active and a standby, there are a handful of databases.
> > On particular one has a few tables just over 100GB, then a few 100
> > tables near 1GB.
>
> 1 GB each?
>
> >
> > What I'd do is start a publication with no tables and add them 1 at a
> > time, refreshing subscription each time.
> >
> > This might take a long time, so my main questions relate to potential
> > network issues or various situations where the instance receiving the
> > logical replication, suddenly stop being able to receive.
> >
> > Resyncing, and the effects of WAL buildup, are my main concern.
> >
> > Accidentally sent a mail to only your email, sorry for that.
> >
> > Regards,
> > Koen De Groote
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com
>
>