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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Indentifying Redundant Indexes
Cary,
I assume that using stored outlines will achieve No 2 in your list. Would
that not be an easier approach?
If you altered the system to have CREATE_STORED_OUTLINES=true and ran for a
period when all scripts are likely to be run, say a month so that all
month-end processing was completed, and then check the
OUTLN.OL$HINTS.HINT_TEXT column with a query such as the following.
1 select hint_text from outln.ol$hints 2* where substr(hint_text,1,5) = 'INDEX' SQL> / HINT_TEXT
-----Original Message-----
Sent: 23 December 2002 05:59
To: Multiple recipients of list ORACLE-L
Mark,
The way we do it is by what you might call extreme brute force:
Like I said, it's a "big hammer" method, but it has its reliability advantages, and the only step that we haven't automated is #6. (I'm assuming that you already have a valid test system as described in #3.) The tool we use that does steps 2, 4, and 5 is called Project Laredo (www.hotsos.com/products/laredo).
Cary Millsap
Hotsos Enterprises, Ltd.
http://www.hotsos.com
Upcoming events:
- Hotsos Clinic 101, Jan 7-9 Knoxville - Steve Adams's Miracle Master Class, Jan 13-15 Copenhagen - 2003 Hotsos Symposium, Feb 9-12 Dallas
-----Original Message-----
Richard
Sent: Sunday, December 22, 2002 10:54 PM
To: Multiple recipients of list ORACLE-L
Dear List,
Firstly - Merry Christmas to those who have not already departed for the holiday season.
I'm currently doing some investigation based around indexes and would
like
everyone's opinion: What is everyone's preferred approach to identify
redundant (as in "never used by Oracle") indexes? I believe Oracle 9
might
have a feature to set a flag on objects and then check back later to see
if
they have been accessed however we're still stuck on 8.1.7.4 (Solaris).
Some of my thoughts include:
Obviously we are searching for indexes to remove and identifying those
which aren't queried over a set period of time would be good candidates
for
a starting point. Any advice you might have would be greatly
appreciated.
Regards,
Mark.
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Mark Richard INET: mrichard_at_transurban.com.au Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Cary Millsap INET: cary.millsap_at_hotsos.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: <John.Hallas_at_vodafone.co.uk INET: John.Hallas_at_vodafone.co.uk Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Mon Dec 23 2002 - 06:13:59 CST
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