I've just discovered I wrote a couple of potentially useful blog notes about
the costs and impact of flashback logging a couple of years ago:
From: oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> on behalf
of Andy Klock <andy@xxxxxxxxxxxxxxx>
Sent: 07 July 2017 14:16:31
Subject: Re: Anyway to estimate how much space flashback logs space will be
needed in 220.127.116.11?
On Thu, Jul 6, 2017 at 12:52 PM, Dba DBA
If I make a guaranteed restore point for a specific point in time. If the DB
generates archivelog, is there a way to estimate how much space will be needed?
We have limited space and may need to backout a build coming. The build
includes a data migration. One option is to take a backout and restore from
backup. The other options is a guaranteed restore point. The migration scripts
are done by a whole other group. I have no idea how much archivelog will be
From my notes, see:
How To Calculate the Size of the Generated Flashback Logs (Doc ID 761126.1)