Re: patch submission: truncate trailing nulls from heap rows to reduce the size of the null bitmap [Review]

From: Noah Misch <noah(at)leadboat(dot)com>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: Simon Riggs <simon(at)2ndQuadrant(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Amit Kapila <amit(dot)kapila(at)huawei(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, Craig Ringer <craig(at)2ndquadrant(dot)com>, Jameison Martin <jameisonb(at)yahoo(dot)com>, Kevin Grittner <kgrittn(at)mail(dot)com>, robertmhaas(at)gmail(dot)com, pgsql-hackers(at)postgresql(dot)org
Subject: Re: patch submission: truncate trailing nulls from heap rows to reduce the size of the null bitmap [Review]
Date: 2013-06-25 02:14:22
Message-ID: 20130625021422.GC840390@tornado.leadboat.com
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On Mon, Jun 24, 2013 at 01:32:41PM -0700, Josh Berkus wrote:
> Do we really have ironclad numbers which show that the patch affects
> performance negatively? I didn't think the previous performance test
> was comprehensive; I was planning to develop one myself this week.

Not ironclad, no:
http://www.postgresql.org/message-id/20130124021205.GB29954@tornado.leadboat.com

--
Noah Misch
EnterpriseDB http://www.enterprisedb.com

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