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RE: INDEX REBUILD

From: DENNIS WILLIAMS <DWILLIAMS_at_LIFETOUCH.COM>
Date: Thu, 19 Jun 2003 13:07:29 -0700
Message-ID: <F001.005B5740.20030619122705@fatcity.com>


Guang - Below is what Jared said on this topic:

Dennis Williams
DBA, 80%OCP, 100% DBA
Lifetouch, Inc.
[EMAIL PROTECTED] -----Original Message-----
Sent: Thursday, December 26, 2002 9:14 PM To: Multiple recipients of list ORACLE-L

Though I have published a script for determining indexes that need to be rebuilt, and then rebuilding them, I have to say that this is almost never necessary.

Why are you rebuilding indexes? About the only reason for ever doing so is that the BLEVEL >= 5.

go to asktom.oracle.com, and do a search on 'index rebuild'.

Currently, the third article may be of interest.

Jared

-----Original Message-----
Sent: Thursday, June 19, 2003 12:34 PM
To: Multiple recipients of list ORACLE-L

Where can I find more detail info about "frequent index rebuilds can reduce your performance" ?

Thanks.

Guang

-----Original Message-----
Sent: Thursday, June 19, 2003 12:00 PM
To: Multiple recipients of list ORACLE-L

Seema - If you analyze in conjunction with rebuilds, you could track with the LAST_ANALYZED column in USER_INDEXES table. That is all I can think of. Why do you ask? Jared has spoken eloquently about how frequent index rebuilds can reduce your performance.

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Author: Guang Mei
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Author: DENNIS WILLIAMS
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