Re: Autovacuum of pg_database

=?UTF-8?Q?Jakub_Jedelsk=C3=BD?= <jakub(dot)jedelsky(at)gmail(dot)com> writes:
> The problem (can) occurs when the pg_database table hits
> `autovacuum_freeze_max_age` and I'm able to reporoduce it (but not always)
> with this stupid reproducer:
> * set autovacuum_freeze_min_age to it's minimum - 100000
> * generating ~ 1000 DBs
> * make some transactions to almost hit `autovacuum_freeze_max_age`
> * `vacuum freeze` all tables in all databases except pg_database
> * run a few transactions to hit `autovacuum_freeze_max_age`

I tried to reverse-engineer a test case out of this description,
without much success. If you have a script that can reproduce
the problem (even if not 100% success rate), could you share it?

regards, tom lane