And in case you miss it in Richard's terse message, one of the big reasons that it
is not 'rocket science' is that you can perform operations that modify the index(es),
and perform block dumps of the index as you go. You can see exactly what Oracle is
doing with the index.
Jared
|
| Yong Huang <yong321@yahoo.com>
Sent by: ml-errors@fatcity.com
12/09/2003 11:44 AM
Please respond to ORACLE-L
|
To: Multiple recipients of list ORACLE-L <ORACLE-L@fatcity.com>
cc:
Subject: Re: rebuilding indexes - sure to cause a ruckus |
Thanks, Richard. I'll read your long message more carefully later. I like your
statement that rebuilding an index or not is not rocket science. One needs to
measure the performance before and after the rebuild and make a conclusion
himself. Many times we discuss performance issues and get very technical and
sophisticated, without showing experimental results! Having been a science
researcher before, I'd like to emphasize that facts speak louder than theories.
There may be 10,000 24x7 databases in the world that don't easily allow even
testing an index rebuild. But there may be 100 times more production databases
in the world that are not 24x7. The individual DBA needs to do his control
study and conclude, using experts' opinions as reference.
Yong Huang
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Received on Tue Dec 09 2003 - 16:14:37 CST
