Thom Brown <[email protected]> writes:
>> On 11 November 2011 23:28, Tom Lane <[email protected]> wrote:
>>> I observe that _bt_delitems_vacuum() unconditionally dirties the page
>>> and writes a WAL record, whether it has anything to do or not; and that
>>> if XLogStandbyInfoActive() then btvacuumscan will indeed call it despite
>>> there being (probably) nothing useful to do. Seems like that could be
>>> improved. The comment explaining why it's necessary to do that doesn't
>>> make any sense to me, either.
>> Well the effect, in the single instances I've checked, is certainly
>> more pronounced for hot_standby, but there still appears to be some
>> occurrences for minimal wal_level too.
> So would you say this is acceptable and normal activity, or is
> something awry here?
Well, it's expected given the current coding in the btree vacuum logic.
It's not clear to me why it was written like that, though.
regards, tom lane
--
Sent via pgsql-hackers mailing list ([email protected])
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
