Re: UNTO TBS behavior in 9i
- From: "Syed Jaffar Hussain" <sjaffarhussain@xxxxxxxxx>
- To: veeeraman@xxxxxxxxx
- Date: Tue, 23 Jan 2007 09:50:43 +0300
Ram,
Your undo_retention is set to 7200 sec, i.e. 120 mint/2 hrs. Do you
really need 2 hrs undo retention?
Upto my understanding, it should be the redo that must be generated
highly not the UNDO.
By the way, how are you inserting data from one table to another?
Jaffar
On 1/23/07, Ram Raman <veeeraman@xxxxxxxxx> wrote:
Hi all,
We are running a batch process to insert data from one table to another. The
data inserted is over than 10 million rows. We had about 20GB of UNDO
tablespace. UNDO_RETENTION is 7200. When we start the insert process no
other process runs and all the time during the insert process nothing else
runs. We insert about 5.5 Gb of data including indexes.
We have the problem of running out of space in the UNDO TBS. The process
erred out thrice due to lack of space in UNTO TBS. It is now set at 30G and
is already 100% full. Why would the UNDO take so much space even though the
data inserted is so less AND there is no simultaneous database activity.
Only active processes other than this insert process is the Oracle
background processes.
Ram.
--
Best Regards,
Syed Jaffar Hussain
8i,9i & 10g OCP DBA
I blog at :http://jaffardba.blogspot.com/
http://www.oracle.com/technology/community/oracle_ace/ace1.html#hussain
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