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Re: Rollback in Postgres

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Lewis Cunningham <lewisc(at)rocketmail(dot)com>
Cc: pgsql-sql(at)postgresql(dot)org, Kaare Rasmussen <kaare(at)jasonic(dot)dk>
Subject: Re: Rollback in Postgres
Date: 2008-07-14 20:54:54
Message-ID: 20080714205454.GL4050@alvh.no-ip.org (view raw or flat)
Thread:
Lists: pgsql-sql
Lewis Cunningham wrote:
> --- On Mon, 7/14/08, Kaare Rasmussen <kaare(at)jasonic(dot)dk> wrote:
> 
> > But yes, it has to be enabled, and yes it has to have a
> > performance cost 
> > somehow, but people are requesting it, and somehow I
> 
> AFAIK, It is built from undo so there is no ADDITIONAL overhead.  It
> just saves the undo that is created anyway for any DML anyway.  That
> undo is already on disk.  

Which means it doesn't work for us, because we don't have UNDO (we only
have REDO).

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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