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Re: dead tuples

From: "Oren Mazor" <oren(dot)mazor(at)gmail(dot)com>
To: "Bruno Wolff III" <bruno(at)wolff(dot)to>
Cc: pgsql-novice(at)postgresql(dot)org
Subject: Re: dead tuples
Date: 2005-07-22 17:31:50
Message-ID: op.subsbctlv14azh@pbook.local (view raw, whole thread or download thread mbox)
Lists: pgsql-novice
what happens is that my database files grow significantly. say i have a  
table filled with people names, and i modify each one, then my database  
seems to double. this is because (afaik) pg marks the old ones as 'dead'  
but doesnt delete them. you run vacuum to reclaim it.

which is what i do. but i'm wondering if there's any way to circumvent the  
entire process of marking them as 'dead' and just deleting things right  
off when they get updated

On Fri, 22 Jul 2005 13:29:19 -0400, Bruno Wolff III <bruno(at)wolff(dot)to> wrote:

> On Fri, Jul 22, 2005 at 10:02:55 -0400,
>   Oren Mazor <oren(dot)mazor(at)gmail(dot)com> wrote:
> What problem are you trying to solve?
> The way Postgres implements MVCC leaves deleted tuples for later clean up
> after they aren't visible to any currently open transaction. This clean  
> up
> is done with vacuum.

Oren Mazor // Developer, Sysadmin, Explorer
GPG Key:
"Ut sementem feceris, ita metes"

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