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RE: Why "Separating Data and Indexes improves performance" is a m yth?

From: Jamadagni, Rajendra <Rajendra.Jamadagni_at_espn.com>
Date: Sun, 25 Apr 2004 10:45:59 -0400
Message-ID: <A186CBDC8B1D61438BC50F1A77E91F73075BD4A4@xchgbrsm1.corp.espn.pvt>


We do see index_skip scans ... Few times a day ...=20

Raj



--------=20

Rajendra dot Jamadagni at nospamespn dot com=20 All Views expressed in this email are strictly personal.=20 select standard_disclaimer from company_requirements;=20 QOTD: Any clod can have facts, having an opinion is an art !

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Mladen Gogala Sent: Friday, April 23, 2004 2:20 PM
To: oracle-l_at_freelists.org
Subject: Re: Why "Separating Data and Indexes improves performance" is a m yth?

Another situation in which fast full scans appear is a report from a reference table, like a list of names of all employees (artificial example, but I have no better at the moment). Those are relatively rare, but they are regular. Speaking of index scans, does anybody here sees skip scans? Few months ago I've had a lengthy discussion with Wolfgang about INDEX_SS, but I have to confess that I've never seen them in real life.

--

Mladen Gogala
Oracle DBA



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Received on Sun Apr 25 2004 - 09:43:20 CDT

Original text of this message

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