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08.07.2006 at 11:28PM PDT, ID: 21946587
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9.2

Difference between rebuild index and create reverse index on db level

Asked by hans_vd in Oracle Database

Tags: , , ,

Hi,

On an oracle table i read 9 times the information.
Totale record in select:             81607

The avarage time reading
desc: 17,69877778
asc:  16,13633333
After i rebuild the index
The avarage time reading
desc: 17,077
asc:  14,01122222
so not a lot of time profit
After this i recreate the index with reverse
Then i recreate the index wihtout revers:
The avarage time reading
desc: 0,076777778
asc:  0,074555556

Can you explain me the difference between rebuild index en recreate index with reverse.  What happens putting on/off the reverse that after the reading goes a lot faster.

Thanks a lotStart Free Trial
 
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[+][-]08.08.2006 at 02:31AM PDT, ID: 17269860

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[+][-]08.08.2006 at 03:27AM PDT, ID: 17270118

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[+][-]08.08.2006 at 04:19AM PDT, ID: 17270372

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[+][-]08.08.2006 at 06:35AM PDT, ID: 17271130

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[+][-]08.08.2006 at 06:50AM PDT, ID: 17271256

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[+][-]08.08.2006 at 07:18AM PDT, ID: 17271487

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[+][-]08.08.2006 at 07:24AM PDT, ID: 17271538

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About this solution

Zone: Oracle Database
Tags: index, oracle, reverse, rebuild
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Solution Provided By: markgeer
Participating Experts: 3
Solution Grade: A
 
 
[+][-]08.08.2006 at 11:19PM PDT, ID: 17276866

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[+][-]08.09.2006 at 02:32AM PDT, ID: 17277506

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