Re: cpu_tuple_cost
От | Bruce Momjian |
---|---|
Тема | Re: cpu_tuple_cost |
Дата | |
Msg-id | 200503150217.j2F2HqA01460@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: cpu_tuple_cost ("Greg Sabino Mullane" <greg@turnstep.com>) |
Список | pgsql-performance |
Greg Sabino Mullane wrote: [ There is text before PGP section. ] > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > > > Reducing random_page_cost is usually the best way to get the > > planner to favor indexscans more. > > On that note, can I raise the idea again of dropping the default > value for random_page_cost in postgresql.conf? I think 4 is too > conservative in this day and age. Certainly the person who will > be negatively impacted by a default drop of 4 to 3 will be the > exception and not the rule. Agreed. I think we should reduce it at least to 3. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073
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