Hi all,
Vacation is over !
We'll have some tables with a PK and between 1 and 3
other fields . Those tables will be insert once and
read 2 to 7 times.
I'm wandering about the use of IOT and done some
tests.
When inserting 700 000 rows, the IOT and the standard
table with a PK took the same time .
When reading by querying on the PK in a loop (looping
700 000 times) I have the same total query time but
the IOT is reading 1 300 000 blocks and spending more
time in the execute phase than in the fetching phase,
the standard table with PK is reading 2 000 000 blocks
and spending just a little bit more time in the
executing phase than the fetching phase.
Those tables may not benefit from a lot of caching
since there are in the staging area of a DW system.
Any advices or bad experience on IOT (Oracle 816, DW
system) ?
=====
St�phane Paquette
DBA Oracle, consultant entrep�t de donn�es
Oracle DBA, datawarehouse consultant
[EMAIL PROTECTED]
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