Re: HOT for PostgreSQL 8.3

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Hannu Krosing <hannu(at)skype(dot)net>
Cc: Simon Riggs <simon(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org, Pavan Deolasee <pavan(dot)deolasee(at)enterprisedb(dot)com>, Nikhil S <nikhil(dot)sontakke(at)enterprisedb(dot)com>, Heikki Linnakangas <heikki(at)enterprisedb(dot)com>
Subject: Re: HOT for PostgreSQL 8.3
Date: 2007-02-12 05:48:06
Message-ID: 22871.1171259286@sss.pgh.pa.us
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Hannu Krosing <hannu(at)skype(dot)net> writes:
> How about adding a new 2-byte field to header for in-page c_tid poiner
> for HOT ?

We just finished sweating blood to get the tuple header size down to 23
bytes from 27 (which saves 8 bytes not 4 if MAXALIGN=8). We are not
going to blow that again on HOT.

regards, tom lane

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