Re: Clustering system catalog indexes
От | Bruce Momjian |
---|---|
Тема | Re: Clustering system catalog indexes |
Дата | |
Msg-id | 200405200258.i4K2wWD20880@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: Clustering system catalog indexes (Alvaro Herrera <alvherre@dcc.uchile.cl>) |
Список | pgsql-hackers |
Alvaro Herrera wrote: > On Wed, May 19, 2004 at 09:43:22PM -0400, Bruce Momjian wrote: > > Christopher Kings-Lynne wrote: > > > Is it worth us marking any system catalog indexes as clusterable by > > > default for performance? > > > > Not sure. Most of the system stuff is loaded in a pretty good order, and > > cluster is only good if you are going after seveal rows of identical > > value or similar value in the same table, and I can't think of a case > > where this would help. Can others? It is a good question. > > pg_attribute maybe? Ah, good point. Because of vacuum reuse, it could grab rows in different locations when creating a table. Good point. Added to TODO: o Add default clustering to system tables -- 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, Pennsylvania19073
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