From: Simon Riggs <simon@2ndquadrant.com>
To: Mario Weilguni <mweilguni@sime.com>
Cc: pgsql-performance@postgresql.org
Cc: Josh Berkus <josh@agliodbs.com>
Cc: Jim Nasby <decibel@decibel.org>
Subject: Re: [pgsql-advocacy] 8.2 -> 8.3 performance numbers
Date: Wed, 25 Jul 2007 15:09:09 +0100
Message-ID: <1185372549.4146.33.camel@ebony.site> (raw)
In-Reply-To: <200707251507.23951.mweilguni@sime.com>
References: <73185727-AD4A-4C97-B243-ADD2EE1875B5@decibel.org>
<46A0EAE3.7030305@agliodbs.com>
<1185367933.4146.13.camel@ebony.site>
<200707251507.23951.mweilguni@sime.com>
On Wed, 2007-07-25 at 15:07 +0200, Mario Weilguni wrote:
> Am Mittwoch 25 Juli 2007 schrieb Simon Riggs:
> > I have reasonable evidence that Referential Integrity is the major
> > performance bottleneck and would like some objective evidence that this
> > is the case.
>
> Just curious, will 8.3 still check FK constraints (and use locks) even if the
> referencing column value does not change?
That is optimised away in 8.0+
--
Simon Riggs
EnterpriseDB http://www.enterprisedb.com
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To: pgsql-performance@postgresql.org
Cc: simon@2ndquadrant.com, mweilguni@sime.com, josh@agliodbs.com, decibel@decibel.org
Subject: Re: [pgsql-advocacy] 8.2 -> 8.3 performance numbers
In-Reply-To: <1185372549.4146.33.camel@ebony.site>
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