Re: scattered reads

From: Tim Gorman <tim_at_sagelogix.com>
Date: Tue, 03 Feb 2004 07:20:04 -0700
Message-ID: <BC44FC24.F957%tim@sagelogix.com>

Nope. The "scattered reads" are just the I/O requests to read the info in SYS.SEG$ from the datafile. There's no better way to do it...

Why are you concerned about this? Is it taking a huge amount of time per wait? Is this query being executed often? If so, then why? The number of such waits is unavoidable (i.e. SEG$ is usually as big as it needs to be), but the duration per wait might be something to investigate, if it is considered excessive...

on 2/3/04 12:28 AM, Kommareddy, Srinivas (MED, Wissen Infotech) at Srinivas.Kommareddy_at_med.ge.com wrote:

> Hi Gurus,
>
> DB: 9.2x
> OS: solaris 2.8
>
> Why the following query is waiting for db file scattered reads....
>
> select segment_name from dba_segments
> where tablespace_name in
> ('ASPD',
> 'CSED',
> 'CUED',
> 'DDDD' ..... 50 more tablespaces.
>
> What could be done to avoid this db file scattered reads ?
>
> Is there a better way to get this.
>
>
> Thanks and Regards,
> Srinivas
> Oracle DBA ( ODC )
> Wissen Infotech Pvt. Ltd.
> Hyderabad, India
> Work +91-40-55313031, 91-40-27892897
> e-mail Srinivas.Kommareddy_at_med.ge.com
> Visit us http://www.wisseninfotech.com <http://www.wisseninfotech.com>
>
>
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Received on Tue Feb 03 2004 - 08:20:04 CST