| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
 |
 | |||
| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
|
| |||
Home -> Community -> Mailing Lists -> Oracle-L -> RE: undo segments vs. rbs
I don't think it does, Paula. Since you don't have control over the =
number
and sizes of your undo segments, there really isn't a direct =
correlation.
Sizing undo really comes down to two questions: 1.) How long is your longest running query?
Make sure your undo_retention is at least that large.
2.) How much undo will your database generate in
the amount of time specified in undo_retention?
Make sure your undo tablespace is at least that
large.
-----Original Message-----
From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of
Paula_Stankus_at_doh.state.fl.us
Sent: Tuesday, May 18, 2004 4:34 PM
To: oracle-l_at_freelists.org
Subject: RE: undo segments vs. rbs
I am working on moving a productional database from 8.0.6 to 9i. I have =
=3D
a question: if I have 10 rbs at 128K (initial and next extent) and one =
=3D
"large" on at 10,485,760 bytes how does that translate into undo =3D
segments? =3D20
Are there any best practices on sizing undo segments?
FAQ is at http://www.freelists.org/help/fom-serve/cache/1.htmlput 'unsubscribe' in the subject line.
-----------------------------------------------------------------
----------------------------------------------------------------
Please see the official ORACLE-L FAQ: http://www.orafaq.com
----------------------------------------------------------------
To unsubscribe send email to: oracle-l-request_at_freelists.org
 |
 |