ITAGAKI Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp> writes:
> Autovacuum uses connections in superuser mode. If all connections are used,
> autovacuum cannot start and the following message is written in server log.
> | FATAL: sorry, too many clients already
> Is this a feature?
Yes.
I coulda sworn there was a specific mention in the docs that you'd
better allow for autovac when choosing superuser_reserved_connections,
but a quick grep doesn't find it.
regards, tom lane