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Re: Effects of framentation

From: Daniel Morgan <damorgan_at_x.washington.edu>
Date: Wed, 28 Jan 2004 07:23:55 -0800
Message-ID: <1075303372.912462@yasure>


Murat Balkas wrote:

> Hi,
>
> my platform is : RedHat, Oracle 8.1.7
>
> We're hosting an application server and the database of our
> customer. We're not responsible of the database users's objects.
> Nowadays the site is terribly slow. I've noticed that all the tables
> and indexes of the user are put in one tablespace and almost all
> objects ( including tables,indexes,... ) in this tablesapce are
> fragmented over %60.
>
> I thnik the problem is about these fragmented objects and some of
> their queries.
>
> I need to prove that the cause of the slowness is the fragmented
> objects and will advise rebuilding them. They'll do that work.
>
> How can I do that? How can I prove that queries answer too slow
> because of the fragmentation.
>
> Any help would be greatly appreciated,
>
> Murat

What query and what results allow you to conclude that "this tablesapce are fragmented over %60."?

I'd want to see an EXPLAIN PLAN or TRACE before I'd begin to consider the conclusion you have reached.

-- 
Daniel Morgan
http://www.outreach.washington.edu/ext/certificates/oad/oad_crs.asp
http://www.outreach.washington.edu/ext/certificates/aoa/aoa_crs.asp
damorgan_at_x.washington.edu
(replace 'x' with a 'u' to reply)
Received on Wed Jan 28 2004 - 09:23:55 CST

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