RE: Rebuild Indexes
- From: John Kanagaraj <john.kanagaraj@xxxxxxx>
- To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 18 Feb 2004 08:59:58 -0800
Naveen,
I believe the problem is not with a monotonically increasing index (which
should NOT be rebuilt as it is of no use) - rather it is with a
monotonically increasing index that is also being _deleted. This is typical
of indexes on FIFO-type tables such as the FND_CONCURRENT_REQUESTS in Apps
(any version). In the latter case, you should perform a 'one-time' index
rebuild of such monotonically-increasing, followed by regular COALESCE of
the indexes to 'reclaim' 'lost' space. Jonathan/Richard Foote might have
something to add on this....
John Kanagaraj <><
DB Soft Inc
Phone: 408-970-7002 (W)
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** The opinions and facts contained in this message are entirely mine and do
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>-----Original Message-----
>From: oracle-l-bounce@xxxxxxxxxxxxx
>[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Naveen,
>Nahata (IE10)
>Sent: Tuesday, February 17, 2004 11:24 PM
>To: oracle-l@xxxxxxxxxxxxx
>Subject: RE: Rebuild Indexes
>
>
>John,
>
>Would it be advisable to go for Index rebuilds in case of
>index based on
>monotonically increasing columns? As much as I understand (and
>I must admit,
>i don't know much about the internals of indexes), in case of
>such indexes
>the problem of 'leaf block split' should not happen.
>
>Regards
>Naveen
>
>>-----Original Message-----
>>From: John Kanagaraj [mailto:john.kanagaraj@xxxxxxx]
>>Sent: Wednesday, February 18, 2004 12:30 PM
>>To: 'oracle-l@xxxxxxxxxxxxx'
>>Subject: RE: Rebuild Indexes
>>
>>
>>Vidya,
>>
>>If you are collecting (and storing) STATSPACK data, you might want to
>>baseline V$SYSSTAT values and look for spurts in 'leaf node
>>splits' after
>>rebuilds....
>>
>>John Kanagaraj <><
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