On Fri, Mar 15, 2019 at 9:48 AM Adrian Klaver <adrian.klaver@xxxxxxxxxxx> 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
It does use replication slots, but there are processes corresponding to each subscription. I have some databases with dozens of them.
Thanks,
Jeremy
