Re: Using quicksort for every external sort run
| От | Robert Haas |
|---|---|
| Тема | Re: Using quicksort for every external sort run |
| Дата | |
| Msg-id | CA+TgmoakcV5FzZwo+WNwbpnXwbY3N+qVs_zKdmE_OYmfivWnkQ@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: Using quicksort for every external sort run (Peter Geoghegan <pg@heroku.com>) |
| Ответы |
Re: Using quicksort for every external sort run
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| Список | pgsql-hackers |
On Wed, Nov 18, 2015 at 6:29 PM, Peter Geoghegan <pg@heroku.com> wrote: > In principle, I have no problem with doing that. Through testing, I > cannot see any actual upside, though. Perhaps I just missed something. > Even 8MB is enough to avoid the multipass merge in the event of a > surprisingly high volume of data (my work laptop is elsewhere, so I > don't have my notes on this in front of me, but I figured out the > crossover point for a couple of cases). I'd be interested in seeing this analysis in some detail. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
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