RE: RE: Rollback Segment Problem

From: K Gopalakrishnan <kaygopal_at_yahoo.com>
Date: Thu, 14 Feb 2002 11:31:09 -0800
Message-ID: <F001.00410258.20020214113544@fatcity.com>

Hi G_DBA ,

The transaction id (which is recorded in the ITL) consists of 3 components. Undo Segment Number, Slot Number and Wrap Number. THe max value of the wrap number is limited by UB4MAXVAL. (Approx 4G in numbers) and once it reaches the MAXVAL the rollback segment is considered as DEAD. i.e. it can not hold undo information for any transactions.,

THis condition is called as DEATH of a Rollback segment. THis is true for SMU also.

Best Regards,
K Gopalakrishnan
Bangalore, INDIA

-----Original Message-----
Sent: Thursday, February 14, 2002 2:35 AM

Hi Ganesh,
Could u please elaborate, i did not get what u said. What do u mean by Rollback segment dying. I did not pick up the earlier mails so maybe thats why. thanks and reg
Guru

On Thu, 14 Feb 2002 K Gopalakrishnan wrote :
> You never need to recreate the rollback segments (DROP
> and CREATE) unless
> the rollback segment dies. THe rollback segment will
> die after approx 4M
> (the number is not very accurate.. okay,, some number)
> transactions.
> THis is the only case I need to drop and recreate them.
>
> Best Regards,
> K Gopalakrishnan
> Bangalore, INDIA
>
>
>
> -----Original Message-----
> From: root_at_fatcity.com [mailto:root_at_fatcity.com]On
> Behalf Of Mohammad
> Rafiq
> Sent: Wednesday, February 13, 2002 9:54 AM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: Rollback Segment Problem
>
>
> In many cases you will have to take RB segments offline
> and drop them, then
> re-create
>

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Author: K Gopalakrishnan
  INET: kaygopal_at_yahoo.com

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Received on Thu Feb 14 2002 - 13:31:09 CST