Re: DBMS_REDEF - How online is it, really?
- From: Andrew Kerber <andrew.kerber@xxxxxxxxx>
- To: stephan uzzell <SUzzell@xxxxxxxxxx>
- Date: Tue, 11 Feb 2014 10:24:29 -0600
I have used it with great success. I had a large number of tables we
wanted to repartition and wrote a couple of stored procedures to accomplish
it. The dbms_Redefinition worked very well.
On Tue, Feb 11, 2014 at 10:03 AM, Uzzell, Stephan <SUzzell@xxxxxxxxxx>wrote:
> 11.2.0.3.7 on OEL 6, in case that matters.
>
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> We've been looking into partitioning some large tables (5 trillion rows,
> 1TB) so that we can better manage them (drop old data, &c.). Right now I'd
> say dbms_redefinition may be the leading candidate, because Oracle says it
> is an online operation. I've been burned by Oracle's idea of "online"
> operations before - alter index rebuild online, if the code is optimized /
> hinted to use that index, may be online as far as Oracle is concerned, but
> it sure wasn't for the end users.
>
>
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> So I'm wondering - has anyone used dbms_redefinition to partition large
> tables? Is it truly online? Can Oracle keep up with inserts in the meantime?
>
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> We are thinking about using RAT to try to play back a typical workload,
> but before we open another can of Oracle worms, I figured a question to the
> list might be a good place to start.
>
>
>
> Thanks!
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>
> *Stephan Uzzell*
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>
--
Andrew W. Kerber
'If at first you dont succeed, dont take up skydiving.'
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