Alvaro Herrera <alvhe...@alvh.no-ip.org> writes:
> Tom Lane wrote:
>> Do we still need the complication in brinsummarize to discriminate
>> against the last partial range? Now that the lock consideration
>> is gone, I think that might be a wart.
> In the case of VACUUM, it's not desirable to create a summarization for
> the last partial range, because if the table is still being filled, that
> would slow down the insertion process.
Hm. Okay, but you should change the comment then, because "we do not want
to spend one RelationGetNumberOfBlocks call" is a pretty weak reason.
Also, I think I would accept that argument for autovacuum, but maybe
not so much for a manual vacuum. Maybe you should drive it off
IsAutovacuumWorker rather than which operation is being done.
regards, tom lane
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