RE: Todays Oracle 11.2.0.2 quiz...
- From: "Taylor, Chris David" <ChrisDavid.Taylor@xxxxxxxxxxxxxxx>
- To: "'robertgfreeman@xxxxxxxxx'" <robertgfreeman@xxxxxxxxx>, "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 2 Aug 2011 10:08:33 -0500
I would reason it this way.
Not E because it's a hidden parameter.
Not B because analyze is bad.
So, A, C, or D.
Further:
Oracle typically steers the standard DBA away from "manually" setting anything
with each new release. So, I throw out A.
Now, either C or D.
Finally:
Oracle also likes to keep default at default with each new release - If too
many people are changing the same value consistently then they did a poor job
configuring that value, so I'd say that the Oracle's "preferred" answer is C.
Chris Taylor
Sr. Oracle DBA
Ingram Barge Company
Nashville, TN 37205
Office: 615-517-3355
Cell: 615-663-1673
Email: chris.taylor@xxxxxxxxxxxxxxx<mailto:chris.taylor@xxxxxxxxxxxxxxx>
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From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Robert Freeman
Sent: Tuesday, August 02, 2011 9:17 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Todays Oracle 11.2.0.2 quiz...
Without looking in the docs, answer this question:
When collecting Oracle statistics in 11.2.0.2 (generally, there are always
fringe cases) you should:
A. Manually set the sample size and not take the default.
B. Use the analyze command.
C. Use the default value for the sample size.
D. Use a sample size between 10 and 20.
E. Set the _optimizer_stats_modify parameter first to a value of 60.
What is your answer and why?
RF
Robert G. Freeman
Master Principal Consultant, Oracle Corporation, Oracle ACE
Author of various books on RMAN, New Features and this shorter signature line.
Blog: http://robertgfreeman.blogspot.com
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