Re: Re: [SQL] improve performance

From: Jan Wieck <janwieck(at)Yahoo(dot)com>
To: Hannu Krosing <hannu(at)tm(dot)ee>
Cc: Alexaki Sofia <alexaki(at)ics(dot)forth(dot)gr>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-sql(at)postgresql(dot)org, pgsql-interfaces(at)postgresql(dot)org
Subject: Re: Re: [SQL] improve performance
Date: 2001-01-16 19:33:03
Message-ID: 200101161933.OAA11693@jupiter.jw.home
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-interfaces pgsql-sql

Hannu Krosing wrote:
> Tom Lane wrote:
> >
> >
> > I've heard lots of people want to increase BLCKSZ, but you're the first
> > one who ever wanted to reduce it. You sure you want to do this? It's
> > going to make the maximum row length uncomfortably short.
>
> And it may even not work, as some system tables (that are also affected
> by this)
> may need the full 8k. AFAIK it has never been tested with BLCKSZ < 8k

Except for two different sorted (but correct) results while
selecting inherited tables in "misc", regression tests passed
with 2K.

Why shouldn't it work? All the catalogs that require really
big data have toast tables now.

Anyway, the 8K default BLCKSZ already restricts index tuples
to 2700 bytes. So I wouldn't recommend it at all.

Jan

--

#======================================================================#
# It's easier to get forgiveness for being wrong than for being right. #
# Let's break this rule - forgive me. #
#================================================== JanWieck(at)Yahoo(dot)com #

_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com

In response to

Browse pgsql-interfaces by date

  From Date Subject
Next Message David Zoll 2001-01-16 19:40:13 How do I install PostgreSQL ODBC Drivers for Windows from Source?
Previous Message Hannu Krosing 2001-01-16 16:44:18 Re: outer join in PostgreSql

Browse pgsql-sql by date

  From Date Subject
Next Message Diehl, Jeffrey 2001-01-16 20:42:45 Help with query. (*)
Previous Message Stephan Szabo 2001-01-16 18:41:13 Re: deferred constraints failing on commit