Re: Amount of redo

I sit corrected.

Yechiel Adar
Mehish
----- Original Message -----
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Sent: Thursday, August 15, 2002 4:43 PM

> yechiel,
>
> I didn't miss the comment, it's not relevant. Archived logs are merely
> copies of redo logs that have been filled. Whether or not archiving is
> turned on, redo logs get filled and reused. Oracle tracks the log
> switches no matter what mode you are in, it just doesn't make the copy
> of the redo log if you aren't in archive log mode.
>
> So he can definitely track log switches in the alert log or in
> v$log_history. Given the number of switches in a week (this is
> approximately the number of archived logs that will be created), he can
> multiply that by the size of his largest redo log (hopefully they are
> all the same size but take the largest one if they are not). That will
> give him the maximum amount of space his archived logs will take in a
> normal week, barring any unusual load activity.
>
> Now.... archived logs generally are NOT the full size of the redo logs
> so this will overestimate. But it's better to have too much space than
> too little
>
> Rachel
> --- Yechiel Adar <adar76_at_inter.net.il> wrote:
> > Hello
> >
> > I do not think that you can estimate the amount of disk space
> > required for
> > archive log without turning archive log on and checking each day to
> > see how
> > much space you already used.
> >
> > To all who replied: I think that you missed his comment that
> > currently he is
> > NOT working with archive log on.
> >
> > Yechiel Adar
> > Mehish
> > ----- Original Message -----
> > To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> > Sent: Wednesday, August 14, 2002 2:08 PM
> >
> >
> >
> > Hi List,
> >
> > I want to put my databse in archive mode(Presently it is non archive
> > mode).I want to estimate
> > space that will be required for archive log taking we will be keeping
> > one week archive on disk. How can i find out amount of redo generated
> > in
> > a week.
> >
> > Regards
> > Pawan Dalmia
> > Extn -5259
> >
> > --
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> > --
> > Author: Pawan Dalmia
> > INET: Pawan.Dalmia_at_orange.co.in
> >
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> > Author: Yechiel Adar
> > INET: adar76_at_inter.net.il
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Yechiel Adar
  INET: adar76_at_inter.net.il

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
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