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Re: questions regarding nologging

From: Arup Nanda <orarup_at_hotmail.com>
Date: Wed, 22 Oct 2003 13:29:25 -0800
Message-ID: <F001.005D3FEF.20031022132925@fatcity.com>


In addition to operations provided in Mladen's explanation, all partitioning operations such as exchange/split.. partition, etc. do not generate data related redo for segments marked nologging.

HTH. Arup

> That's because nologging attribute only affects the "direct"
> operations, i.e. the the operations that prebuild blocks and add
> them below the flood watermark. That includes sqlloader with direct=y,
> inserts with /*+ append */ hint and CTAS. Normal SQL based operations
> are not affected.
>
> On 10/22/2003 04:39:34 PM, Roger Xu wrote:
> > > Hi Gurus,
> > >
> > > I have a couple of questions regarding "nologging".
> > >
> > > 1) alter table tabname move tablespace tbsname nologging;
> > >
> > > How come this sql still generated same amount of redo logs equal
> > to the size of the table?
> > >
> > > 2) alter index idxname rebuild tablespace tbsname nologging;
> > >
> > > This sql only generate minimum redo logs.
> > > But the index ends up LOGGING=NO in dba_indexes view.
> > > How do I turn the logging on for this index?
> > >
> > > Thanks,
> > >
> > > Roger Xu
> > > Database Administrator
> > > Dr Pepper Bottling Company of Texas
> > > (972)721-8337
> > >
> > --
> > Please see the official ORACLE-L FAQ: http://www.orafaq.net
> > --
> > Author: Roger Xu
> > INET: roger_xu_at_dp7uptx.com
> >
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>
> Mladen Gogala
> Oracle DBA
>
>
>
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Mladen Gogala
> INET: mladen_at_wangtrading.com
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Arup Nanda
  INET: orarup_at_hotmail.com

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
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Received on Wed Oct 22 2003 - 16:29:25 CDT

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