Re: Do all superuser processes count toward superuser_reserved_connections?

On Fri, Mar 15, 2019 at 9:48 AM Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
wrote:

> On 3/14/19 8:23 AM, Jeremy Finzel wrote:
> > I don't find a clear mention in the docs of superuser processes that are
> > exempt from counting toward superuser_reserved_connections. So I would
> > think that it's possible that postgres autovac workers ought to count
> > toward that. Am I wrong about that? I actually have the same question
>
> AFAICK autovacuum workers do not use the connections referred to above.
> The details can be found here:
>
> https://doxygen.postgresql.org/autovacuum_8c.html

Not sure I can really grok that and how it answers the question. Are you
saying if you have max_connections set to 10, you could theoretically have
20 autovac processes still?

> > about pglogical replication background workers and manager, which also
> > run as postgres.
>
> But the actual connection can be by a different user:
>
> https://www.postgresql.org/docs/11/logical-replication-security.html
>
>
But I am speaking of pglogical, which does require superuser, last I
checked :). <adrian(dot)klaver(at)aklaver(dot)com>

It does use replication slots, but there are processes corresponding to
each subscription. I have some databases with dozens of them.

Thanks,
Jeremy