Hi,

On 2018-12-14 13:35:50 -0500, Tom Lane wrote:
> Hm.  It *could*, if we wanted it to run some transactions after
> finishing recovery.

How, we don't have infrastructure for changing databases yet?


> But I guess I wonder why bother; if the disk
> space is gone then there's not that much reason to be in a hurry
> to get rid of the catalog entries.  The particular problem Alvaro
> is complaining of might be better handled by ignoring temp tables
> while computing max freeze age etc.  I have some recollection that
> we'd intentionally included them, but I wonder why really; it's
> not like autovacuum is going to be able to do anything about an
> ancient temp table.

We can't truncate the clog, adapt the xid horizon, etc if there's any
temp tables. Otherwise you'd get failures when reading from one, no?

Greetings,

Andres Freund

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