Re: A Simple Rollback Segment Question

From: <hemantchitale_at_charteredsemi.com>
Date: Tue, 08 Jan 2002 22:47:53 -0800
Message-ID: <F001.003EA9AB.20020108222518@fatcity.com>

>>Personally I never create one. First thing I do though is create the rbs
>>tablespace with a couple of rollback seg's before all other create
scripts.

Yes, but in the "pre-historic" days, you couldn't create the rbs tablespace without first creating
a non-system rollback segment in the system tablespace !

Hemant K Chitale
Principal DBA
Chartered Semiconductor Manufacturing Ltd

nlzanen1_at_EY.NL 08/01/2002 07:10 PM
Sent by: root_at_fatcity.com

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             To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>           
                        
             cc: (bcc: CHITALE Hemant Krishnarao/Prin DBA/CSM/ST Group)                
                        
             Subject: Re: A Simple Rollback Segment Question

AFAIK this is a prehistoric requirement (Pre 7.3 I believe, No offense meant :-)). Oracle needed it to create the tablespaces etc. Since 7.3 this is no longer required (anyone know exactly when?). Personally I never create one. First thing I do though is create the rbs tablespace with a couple of rollback seg's before all other create scripts.

Jack

Naveen Nahata <naveen_nahata_at_yahoo.com>@fatcity.com on 08-01-2002 10:50:21

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To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> cc: (bcc: Jack van Zanen/nlzanen1/External/MEY/NL)

Hello people,
This one is from Oracle Manual:

"In general, after database creation, you should create at least one additional rollback segment in the SYSTEM tablespace. "

I can understand that you should create one additional rollback segment after database creation b'coz otherwise oracle will use the SYSTEM rollback segment and this may lead to fragmentation in the SYSTEM tablespace and also a performance degradation. But why is one additional rollback segment needed in SYSTEM TABLESPACE?

TIA

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Received on Wed Jan 09 2002 - 00:47:53 CST