There is a .pdf out on technet that speaks to uniform extents management guidelines. There are recommendations as to how many extents you should really have, extent sizes based on table sizes, etc.
Go to technet.oracle.com and select the "Internet DBA" tag on the left. Then select "Performance and Scalability" - Finally select the topic labeled "How to Stop Defragmenting and Start Living"
Hope you find this helpful -
Susan McClain Director, Data Management marchFIRST - Columbus
----Original Message Follows----
From: "Bunyamin K.Karadeniz"
Reply-To: ORACLE-L@fatcity.com
To: Multiple recipients of list ORACLE-L
Subject: Re: Locally managed tablespaces
Date: Tue, 30 Jan 2001 10:30:29 -0800
But some had claimed that Locally managed tablespaces are slower. I do
not know if it is correct but you must consider it .
And I wonder the performance results too.
----- Original Message -----
To: Multiple recipients of list ORACLE-L
Sent: Tuesday, January 30, 2001 3:35 PM
> I have always been concerned with fragmentation of tablespaces, whether it
> be lots of extents, honeycomb or
> bubble fragmentation. Now I am reading that in Oracle 8i with the use of
> locally-managed table spaces,
> these concerns are a thing of the past as Oracle now uses bit maps within
> the tablespaces themselves to
> do space management. This seems foreign to me that even though Oracle will
> use up all the space in
> the tablespaces with no coalescing, it is OK that extents will go into
the
> thousands with no performance degradation.
> Could folks who are currently using locally managed tablespaces please
> comment on how well it
> is working for them and if they have experienced any problems in using
them.
> Thanks
> Skip
> Here is a good white paper on the subject.
> http://www.embarcadero.com/news/white_papers.htm
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Received on Tue Jan 30 2001 - 14:07:08 CST
