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Re: Different index usage by Oracle* optimizer

From: Keith Boulton <boulke_at_globalnet.co.uk>
Date: Sun, 19 Sep 1999 12:04:17 GMT
Message-ID: <37eb6505.90468537@news.globalnet.co.uk> 





On Fri, 17 Sep 1999 11:11:55 GMT, broeni_at_my-deja.com wrote:



I frequently find that Oracle 7 would perform a full table scan even
when it was 1000x slower than an indexed search. I thought this had
been improved in 8. My own preference is to put optimizer_mode =
first_rows in init.ora. This may mean that a full table scan is
avoided when it is more efficient but that generally does not cause a
big performance problem.

Received on Sun Sep 19 1999 - 07:04:17 CDT












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