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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Oracle Expert and FK indexes
Hello, Patrice -- I realize that you wrote this last month. Did you ever draw any conclusions about this behavior?
I am trodding the foreign key ground right now hoping to find the golden key
to a huge performance issue.
I found many "unindexed foreign keys" (using the scripts per Note:16428.1),
however none were in the areas I was researching.
I wonder if Expert wanted you to drop them if your table has few rows or if it has very little variability in the values. Did you ever find the answer to why Expert suggested this? Just wondering.
-----Original Message-----
Sent: Thursday, November 15, 2001 10:30 AM
To: Multiple recipients of list ORACLE-L
Does someone know why the Oracle Expert would recommend dropping indexes on FK columns?
Maybe it calculates there is a low likelihood of the table being locked during referential integrity checks ?
I thought it was a good idea to have indexes on FK columns... this is an old 7.3.4.5. database.
Regards,
Patrice Boivin
Systems Analyst (Oracle Certified DBA)
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Please see the official ORACLE-L FAQ: http://www.orafaq.com
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Author: Boivin, Patrice J
INET: BoivinP_at_mar.dfo-mpo.gc.ca
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Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists --------------------------------------------------------------------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 17 2001 - 14:44:35 CST
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