Re: rebuild indexes

From: Andrew Kerber <andrew.kerber_at_gmail.com>
Date: Fri, 18 Apr 2014 13:24:11 -0500
Message-ID: <CAJvnOJazRQM-kHZFiZQNCyyW03MAukU=XgsnVOpRm8uJVHkVjQ_at_mail.gmail.com>

yes, the move will have a table lock, but it should happen quickly, the tables are pretty small. THe indexes become invalid once the table is moved, but if you are on enterprise edition you can use the online option which reduces the lock time to a very short time while the index is switched.

On Fri, Apr 18, 2014 at 1:15 PM, Jeffrey Beckstrom <JBECKSTROM_at_gcrta.org>wrote:

> How many blocks is the table occupying? For the number of rows you list,
> it can't be more than a block or two and would probably save little.
>
> >>> Andy Gmail <andrew.kerber_at_gmail.com> 4/18/14 2:05 PM >>>
>
> Yes. Just run alter table move tablespace whatever then rebuild the
> indexes. That will accomplish what you need.
>
> Sent from my iPhone
>
> On Apr 18, 2014, at 12:37 PM, "Zelli, Brian" <Brian.Zelli_at_RoswellPark.org>
> wrote:
>
> One table has 14 rows and the other has 26. They say it is causing
> performance issues……
>
> Brian
>
> *From:* Andrew Kerber [mailto:andrew.kerber_at_gmail.com<andrew.kerber_at_gmail.com>]
>
> *Sent:* Friday, April 18, 2014 1:37 PM
> *To:* Zelli, Brian
> *Cc:* oracle-l (oracle-l_at_freelists.org)
> *Subject:* Re: rebuild indexes
>
> How big is the table? He probably wants you to shrink it by eliminating
> unused blocks. The simplest way to do that is by an alter table move
> command followed by alter index rebuild.
>
> Sent from my iPad
>
>
> On Apr 18, 2014, at 12:26 PM, "Zelli, Brian" <Brian.Zelli_at_RoswellPark.org>
> wrote:
>
> A vendor wants me to shrink a table. I’ve never shrunk one in oracle.
> Does that delete the data out of them?
>
> And then wants me to rebuild the associated indexes. Won’t they be empty
> after you shrink them?
>
> Brian
>
>
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-- 
Andrew W. Kerber

'If at first you dont succeed, dont take up skydiving.'

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Received on Fri Apr 18 2014 - 20:24:11 CEST