Re: ALTER ROLLBACK SEGMENT rbs SHRINK

From: Mohammad Rafiq <rafiq9857_at_hotmail.com>
Date: Wed, 30 Jan 2002 09:29:43 -0800
Message-ID: <F001.004008A5.20020130084027@fatcity.com>

Yes, it can be shrinked below optimal as per following details specially R03 rollback segment....
Regards
Rafiq

before:
NAME EXT MB OPTSIZE ACTIVE WATER SHRINKS WRAPS WAITS STATUS
--------------- ---- ------- ------- ------- ------- ------- -------- ------

---

SYSTEM 2 0.2 0.0 0.1 0 0 0 ONLINE
R04 57 115.8 200 0.0 115.8 0 0 0 ONLINE
R01 50 101.6 200 0.0 101.6 0 0 0 ONLINE
R02 50 101.6 200 0.0 101.6 0 0 0 ONLINE
R03 99 201.1 200 0.0 201.1 0 0 0 ONLINE

---

run script:
SQL> alter rollback segment r03 shrink to 100M;

After:

NAME EXT MB OPTSIZE ACTIVE WATER SHRINKS WRAPS WAITS STATUS
--------------- ---- ------- ------- ------- ------- ------- -------- ------

---

SYSTEM 2 0.2 0.0 0.1 0 0 0 ONLINE
R04 57 115.8 200 0.0 115.8 0 0 0 ONLINE
R01 50 101.6 200 0.0 101.6 0 0 0 ONLINE
R02 50 101.6 200 0.0 101.6 0 0 0 ONLINE
R03 50 101.6 200 0.0 201.1 5 0 0 ONLINE Reply-To: ORACLE-L_at_fatcity.com
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Date: Wed, 30 Jan 2002 07:25:30 -0800

no, you can't shrink a rollback segment below the optimal value

• Sinard Xing <sinardyxing_at_bcs-ach.com.sg> wrote:
  > Hi,
  >
  >
  > Assume
  > INITIAL * MINEXTENT = 2M and also = OPTIMAL
  >
  > Do you think
  > ALTER ROLLBACK SEGMENT rbs SHRINK TO 1M;
  >
  > will work ?
  >
  >
  >
  > Thanks,
  >
  > Sinardy
  > --
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  > Author: Sinard Xing
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MOHAMMAD RAFIQ


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Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Mohammad Rafiq
  INET: rafiq9857_at_hotmail.com

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Received on Wed Jan 30 2002 - 11:29:43 CST