Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

To: "Robert Haas" <robertmhaas@xxxxxxxxx>, "Tom Lane" <tgl@xxxxxxxxxxxxx>
Subject: Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
From: "Kevin Grittner" <Kevin.Grittner@xxxxxxxxxxxx>
Date: Fri, 21 Jan 2011 14:00:44 -0600
Cc: "Achilleas Mantzios" <achill@xxxxxxxxxxxxxxxxxxxxx>, <pgsql-performance@xxxxxxxxxxxxxx>
In-reply-to: <17201.1295638006@xxxxxxxxxxxxx>
References: <955263366.48014741295283147090.JavaMail.root@xxxxxxxxxxxxxxx> <201101191110.05268.achill@xxxxxxxxxxxxxxxxxxxxx> <21792.1295458016@xxxxxxxxxxxxx> <201101200905.26400.achill@xxxxxxxxxxxxxxxxxxxxx> <AANLkTimeC41oJ34yzPPf3wc_qQ_mKT_=krCcD7OMEYsc@xxxxxxxxxxxxxx><AANLkTimeC41oJ34yzPPf3wc_qQ_mKT_=krCcD7OMEYsc@xxxxxxxxxxxxxx> <17201.1295638006@xxxxxxxxxxxxx>

Tom Lane <tgl@xxxxxxxxxxxxx> wrote:
 
> If it should be less than 1, then what?
 
1 - (estimated tuples / estimated distinct values) ?
 
-Kevin


-- 
Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance

Follow-Ups:
- Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
  - From: Tom Lane

References:
- Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
  - From: Ing. Marcos Ortiz Valmaseda
- Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
  - From: Achilleas Mantzios
- Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
  - From: Tom Lane
- Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
  - From: Achilleas Mantzios
- Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
  - From: Robert Haas
- Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
  - From: Tom Lane

Prev by Date: Re: Fun little performance IMPROVEMENT...
Next by Date: Re: Fun little performance IMPROVEMENT...
Previous by thread: Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
Next by thread: Re: "NOT IN" substantially slower in 9.0.2 than 8.3.13 - NOT EXISTS runs fast in both 8.3.13 and 9.0.2
Index(es):
- Date
- Thread

[Postgresql General] [Postgresql PHP] [PHP Users] [PHP Home] [PHP on Windows] [Kernel Newbies] [PHP Classes] [PHP Books] [PHP Databases] [Yosemite]