well, only when you are deleting massive amounts of data or truncating
with drop storage.. then there is an impact because of the hits on the
dictionary tables.
but basically yes... I've been told by various Oracle employees that up
to 4096 extents cause no problem whatsoever.
- Christopher Spence <cspence_at_FuelSpot.com> wrote:
> That is completely a myth. There is no notable performance different
> with a
> table with 10,000 extents and one with 1.
>
> The only problem is when it comes to the bitmaps when dealing with
> LMT and
> cluster when dealing with dictionary managed. When you query the
> extent
> views, or do space management type processes.
>
> "Do not criticize someone until you walked a mile in their shoes,
> that way
> when you criticize them, you are a mile a way and have their shoes."
>
> Christopher R. Spence
> Oracle DBA
> Phone: (978) 322-5744
> Fax: (707) 885-2275
>
> Fuelspot
> 73 Princeton Street
> North, Chelmsford 01863
>
>
>
> -----Original Message-----
> Sent: Monday, October 01, 2001 7:15 PM
> To: Multiple recipients of list ORACLE-L
>
> May be it is good practice to keep number of extents to be less than
> 50, no
> matter what the size of extent.
>
>
>
> -----Original Message-----
> Sent: Monday, October 01, 2001 3:35 PM
> To: Multiple recipients of list ORACLE-L
>
>
> Hello,
>
> I'll do an reorganization of a database (about 140 gigs). Some people
> say
> that it'd be good to use 128K, 4M and 128M extents. I saw somewhere
> it'd be
> 160K, 4M and 160M. Which size do you advice me ? I have also many
> small
> indexes (less than 16K).
>
> Regards,
>
> Thanh-truc Nguyen
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Thanh-truc Nguyen
> INET: truc_at_nguyen.as
>
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Received on Tue Oct 02 2001 - 10:43:29 CDT
