liam saffioti <liam.saffiotti@xxxxxxxxx> writes: > Do you think timescaledb is causing this problem? Seems possible. > 2021-09-10 01:00:32.691 156668 FATAL: cannot read pg_class without > having selected a database > 2021-09-10 01:00:33.356 110257 LOG: autovacuum launcher process (PID > 156668) exited with exit code 1 This is pretty clear evidence that some code running inside the autovacuum launcher process tried to read a non-shared catalog, which it cannot do because the launcher isn't connected to any specific database within the cluster. It is highly unlikely that anything in core Postgres is doing that; we'd have noticed. So I conclude that some extension code is carelessly trying to do catalog accesses without checking to see if it's running in a background process that doesn't support that. Of the extensions you listed, timescaledb is perhaps the most likely to contain such a bug; but I don't know much about hypopg, pg_partman, pg_stat_kcache, or powa, so I can't completely rule those out. It would have to be an extension that sometimes acts of its own accord without being called by a SQL command, so the list of suspects isn't all that long. Anyway, your first step should be to make sure you have up-to-date versions of all those extensions. If you do, then try filing a bug with timescaledb. regards, tom lane
