Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> Re: RE: quick suggestions for tuning ?

Re: RE: quick suggestions for tuning ?

From: Prem Khanna J <jprem_at_kssnet.co.jp>
Date: Wed, 13 Aug 2003 01:39:23 -0800
Message-ID: <F001.005CA5E6.20030813013923@fatcity.com>


>Profile(sex,entpc,laccess) and profile(sex,entpc,faccess)
>Would appear to be called for. Obviousdly you will wish to analyze the
>schema, and even more obviously you will do all this in test first.
>If sex is a column that does not have many values (one would think no
>more than 8 or so) then you can make this a compressed index degree 1,
>if entpc also has very few values compressing it degree 2 might be
>helpful (though I'd be sceptical).

Thanx a lot for your suggestions Niall.
i hope the indexes on sex & entpc in profile table is not necessary. so there are some unwanted indexes to be dropped.

"On the contrary, the performance by index scan will decrease because Oracle must translate the <prefix, suffix> part in corresponding key"

Found the above lines in a metalink doc. about index compression. I don't know how far it will affect my performance.Need to test it.

Thanks and Regards,
Jp.

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Prem Khanna J
  INET: jprem_at_kssnet.co.jp

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 Wed Aug 13 2003 - 04:39:23 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US