Re: Aggressive memory consumption in {ts,array}_typanalyze
От | Robert Haas |
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Тема | Re: Aggressive memory consumption in {ts,array}_typanalyze |
Дата | |
Msg-id | CA+Tgmobd2NJ1p46xyW6z=yD8ffL4kDznYFq-+yru1+Z=ixAZow@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Aggressive memory consumption in {ts,array}_typanalyze (Robert Haas <robertmhaas@gmail.com>) |
Список | pgsql-hackers |
On Wed, Apr 18, 2012 at 11:09 AM, Robert Haas <robertmhaas@gmail.com> wrote: > On Mon, Apr 16, 2012 at 4:58 PM, Noah Misch <noah@leadboat.com> wrote: >> The size hint I chose is fairly arbitrary. Any suggestions for principled >> alternatives? > > Based on your test results, it doesn't seem like it matters very much > what you put in there, so I'm inclined to think that num_mcelem is > fine. I thought about maybe allowing for a little slop, like > num_mcelem * 10, but maybe the way you did it is better. It's > possible that people will set ridiculously overblown stats targets on > some columns, and that's certainly going to cost something no matter > what we do, but there's no point in making that worse than it has to > be without some clear reason for doing so. Hearing no further comments, I have committed your patch. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
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