((Re)): problem interpreting wait events

From: ryan gaffuri <ryan.gaffuri_at_comcast.net>
Date: Mon, 23 Aug 2004 16:53:45 -0400
Message-ID: <008401c48953$48650f50$350a5444@ryan2le36ofjce>

i don't have a problem with performance. I think I am checking the wrong data dictionray view. I took the p2 value from db file sequential read and I thought I could use the block_id in dba_extents. When I query on it, I get 'no rows selected', so I think I am using the wrong view.

anyone know which one to use for this?
----- Original Message -----
From: "Daniel Fink" <Daniel.Fink_at_Sun.COM> To: <oracle-l_at_freelists.org>
Sent: Monday, August 23, 2004 2:57 PM
Subject: Re: problem interpreting wait events

> Ryan,
>
> I have found that this type of query against dba_extents performs
horribly. My solution has been to create a GTT, load relevant data
> from dba_extents, slap an index on file_id and block_id and query the GTT.
Even in some of the larger dbs I've done this on, the
> overall time was much less than the original query.
>

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Received on Mon Aug 23 2004 - 15:49:31 CDT