RE: table reorganizations - simple/complex

Nelson, I think you're right on both accounts.

About how a fragmented table would show up in 10046 data: there are lots of people on the list. Maybe one has the time to try it. If it takes more time, it'll show up in response time *somehow*. If not, then it's simply not a problem for the case being traced.

Cary Millsap
Hotsos Enterprises, Ltd.
http://www.hotsos.com

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-----Original Message-----
nelson.petersen_at_homehardware.ca
Sent: Thursday, January 08, 2004 2:59 PM To: Multiple recipients of list ORACLE-L

Comments in-line.

-----Original Message-----
Sent: Wednesday, January 07, 2004 10:59 PM To: Multiple recipients of list ORACLE-L

>There are a lot of tuning "authorities" that make hard
>and fast rules about how to find problem areas by simply
>running a few queries.
>
>It is unfortunately, not that simple. Or for people like
>Cary Millsap, Gary Goodman, Steve Adams, Jonathan Lewis
>and a number of others, it is, fortunately for them, not
>that simple. ;)
>
>

I think Cary and Gary (plus many others) would argue that the hard-and-fast rules accompanied by long, multiple checklists of parameter settings, v$ queries, etc. are what is truly "not simple."

The whole point of Method-R (the Millsap/Goodman/Holt tuning method) is to
de-mystify
and simplify tuning. Eliminate the guess-work. Precisely identify the performance issue and nail it. Everyone who is willing to put in some sweat
equity
can use Method-R.

I'm not sure how a badly fragmented table would show up in a 10046 trace file.
If a table reorganization is really required, I think a trace would show excess physical io.

Nelson Petersen

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