On 3/4/19, 2:05 PM, "Andres Freund" <andres@anarazel.de> wrote:
> On 2019-03-04 22:00:47 +0000, Bossart, Nathan wrote:
>> On 3/4/19, 1:44 PM, "Andres Freund" <andres@anarazel.de> wrote:
>> > Yea, I do think that's a danger. But we allow disabling autovacuum, so
>> > I'm not sure it matters that much... And for indexes you'd still have
>> > the index page-level vacuum that'd continue to work.
>>
>> I think the difference here is that there isn't something like
>> autovacuum_freeze_max_age to force index cleanup at some point.
>> Granted, you can set autovacuum_freeze_max_age to 2B if you want, but
>> at least there's a fallback available.
>
> Well, but your cluster doesn't suddenly shut down because of index bloat
> (in contrast to xid wraparound). So I don't quite see an equivalent need
> for an emergency valve. I think we should just put a warning into the
> reloption's docs, and leave it at that.
That seems reasonable to me.
Nathan