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Re: Large databases, performance

From: "Shridhar Daithankar" <shridhar_daithankar(at)persistent(dot)co(dot)in>
To: Manfred Koizar <mkoi-pg(at)aon(dot)at>, pgsql-hackers(at)postgresql(dot)org,pgsql-general <pgsql-general(at)postgresql(dot)org>,pgsql-performance(at)postgresql(dot)org
Subject: Re: Large databases, performance
Date: 2002-10-09 08:07:13
Message-ID: 3DA43109.23106.1978CDFD@localhost (view raw or flat)
Thread:
Lists: pgsql-generalpgsql-hackerspgsql-performancepgsql-sql
On 9 Oct 2002 at 10:00, Manfred Koizar wrote:

> On Mon, 07 Oct 2002 15:07:29 +0530, "Shridhar Daithankar"
> <shridhar_daithankar(at)persistent(dot)co(dot)in> wrote:
> >Only worry is database size. Postgresql is 111GB v/s 87 GB for mysql.
> 
> Shridhar,
> 
> here is an implementation of a set of user types: char3, char4,
> char10.  Put the attached files into a new directory contrib/fixchar,
> make, make install, and run fixchar.sql through psql.  Then create
> your table as
> 	CREATE TABLE tbl (
> 	type		int,
> 	esn		char10,
> 	min		char10,
> 	datetime	timestamp,
> 	opc0		char3,
> 	...
> 	rest		char4,
> 	field0		int,
> 	field1		char4,
> 	...
> 	)
> 
> This should save 76 bytes per heap tuple and 12 bytes per index tuple,
> giving a database size of ~ 76 GB.  I'd be very interested how this
> affects performance.
> 
> Code has been tested for v7.2, it crashes on v7.3 beta 1.  If this is
> a problem, let me know.

Thank you very much for this. I would certainly give it a try. Please be 
patient as next test is scheuled on monday.

Bye
 Shridhar

--
love, n.:	When it's growing, you don't mind watering it with a few tears.


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