From: Pierre C <lists@peufeu.com>
To: Robert Haas <robertmhaas@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Kenneth Marshall <ktm@rice.edu>
Cc: Mladen Gogala <mladen.gogala@vmsinfo.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Select count(*), the sequel
Date: Wed, 27 Oct 2010 21:52:49 +0200
Message-ID: <op.vk82ubgueorkce@apollo13> (raw)
In-Reply-To: <2091.1288133491@sss.pgh.pa.us>
References: <4CB9D89E.7050701@vmsinfo.com>
<20101016184443.GA4993@aart.is.rice.edu>
<AANLkTik6ifMywZq7C1_MiHLafOQ53_OXreHYQdps3GqP@mail.gmail.com>
<2091.1288133491@sss.pgh.pa.us>
> Even if somebody had a
> great idea that would make things smaller without any other penalty,
> which I'm not sure I believe either.
I'd say that the only things likely to bring an improvement significant
enough to warrant the (quite large) hassle of implementation would be :
- read-only / archive tables (get rid of row header overhead)
- in-page compression using per-column delta storage for instance (no
random access penalty, but hard to implement, maybe easier for read-only
tables)
- dumb LZO-style compression (license problems, needs parallel
decompressor, random access penalty, hard to implement too)
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To: pgsql-performance@postgresql.org
Cc: lists@peufeu.com, robertmhaas@gmail.com, tgl@sss.pgh.pa.us, ktm@rice.edu, mladen.gogala@vmsinfo.com
Subject: Re: Select count(*), the sequel
In-Reply-To: <op.vk82ubgueorkce@apollo13>
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