Re: [HACKERS] Performance degradation in Bitmapscan (commit75ae538bc3168bf44475240d4e0487ee2f3bb376)

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От Andres Freund
Тема Re: [HACKERS] Performance degradation in Bitmapscan (commit75ae538bc3168bf44475240d4e0487ee2f3bb376)
Дата
Msg-id 20161216173431.tl6ezonn3rcohvek@alap3.anarazel.de
обсуждение исходный текст
Ответ на Re: [HACKERS] Performance degradation in Bitmapscan (commit 75ae538bc3168bf44475240d4e0487ee2f3bb376)  (Robert Haas <robertmhaas@gmail.com>)
Ответы Re: [HACKERS] Performance degradation in Bitmapscan (commit75ae538bc3168bf44475240d4e0487ee2f3bb376)  (Andres Freund <andres@anarazel.de>)
Список pgsql-hackers
On 2016-12-16 10:12:42 -0500, Robert Haas wrote:
> On Wed, Dec 14, 2016 at 11:20 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> > I've got no problem with that at all, but I want to unbreak things
> > more or less immediately and then you/we can further improve it later.
> 
> Committed

Thanks. Although "Fix drastic slowdown when ..." or so might have been a
less confusing commit message ;)

> , although I realize now that doesn't fix Dilip's problem,
> only my (somewhat different) problem.

Indeed. And the fix for Dilip's thing also fixes your issue, albeit what
you committed still helps noticeably (even with the old hashtable).

> To fix his issue, we need something like your 0001.  Are you going to
> polish that up soon here?

Yes.


Andres



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