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Re: Pet Peeves?

From: Greg Stark <stark(at)enterprisedb(dot)com>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: Chris Mayfield <cmayfiel(at)cs(dot)purdue(dot)edu>, pgsql-general(at)postgresql(dot)org
Subject: Re: Pet Peeves?
Date: 2009-02-04 02:39:18
Message-ID: (view raw or whole thread)
Lists: pgsql-general
On Tue, Feb 3, 2009 at 10:06 PM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> On Tue, 2009-02-03 at 15:03 -0500, Chris Mayfield wrote:
>> 1. Having to rewrite entire tables out to disk the first time I scan
>> them, for example:
>> CREATE TABLE t1 AS ...; -- writes 100 GB to disk
>> CREATE INDEX i1 ON t1 ...; -- rewrites 100 GB to disk
>> The main issue is setting the hint bits for each tuple, which IMO should
>> initially be set for "CREATE TABLE AS" statements.  To work around this
>> for now, I modified heap_insert (in heapam.c) to mark tuples as
>> committed when inserting them into newly added pages without WAL:
> I'll take this for 8.5.

This was proposed once already and some difficulties were identified.
Do you remember what they were?


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