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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Oracle Expert and FK indexes
I didn't do what the Oracle Expert told me to do... no time to "experiment".
I will ask Oracle Support what is going on, thanks for reminding me.
Regards,
Patrice Boivin
Systems Analyst (Oracle Certified DBA)
-----Original Message-----
From: Shreter, Hilary [SMTP:ShreterH_at_orau.gov]
Sent: Monday, December 17, 2001 4:10 PM
To: Multiple recipients of list ORACLE-L
Subject: 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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Author: Boivin, Patrice J
INET: BoivinP_at_mar.dfo-mpo.gc.ca
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
San Diego, California -- Public Internet access / Mailing
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Boivin, Patrice J INET: BoivinP_at_mar.dfo-mpo.gc.ca 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 Tue Dec 18 2001 - 06:27:44 CST
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