Re: Performance on inserts
Bruce Momjian <pgman@candle.pha.pa.us>
From: Bruce Momjian <pgman@candle.pha.pa.us>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Jules Bean <jules@jellybean.co.uk>, Alfred Perlstein <bright@wintelcom.net>, pgsql-hackers@postgresql.org
Date: 2000-10-15T21:51:48Z
Lists: pgsql-hackers
> > * Prevent index lookups (or index entries using partial index) on most > > common values; instead use sequential scan > > This behavior already exists for the most common value, and would > exist for any additional values that we had stats for. Don't see > why you think a separate TODO item is needed. You mean the optimizer already skips an index lookup for the most common value, and instead does a sequential scan? Seems you are way ahead of me. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026