RE: Todays Oracle 11.2.0.2 quiz...
- From: Michael Dinh <mdinh@xxxxxxxxx>
- To: "robertgfreeman@xxxxxxxxx" <robertgfreeman@xxxxxxxxx>, "oracle-l@xxxxxxxxxxxxx" <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 2 Aug 2011 08:00:20 -0700
A - generally
I use dbms_stats.auto_sample_size (default I think) having read about improved
accuracy in 11.2.0.2
When default does not cut it, then change.
Trust but verify.
________________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx [oracle-l-bounce@xxxxxxxxxxxxx] On Behalf
Of Robert Freeman [robertgfreeman@xxxxxxxxx]
Sent: Tuesday, August 02, 2011 7:16 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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