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How to analyze different performance while creating domain index on Oracle 12.1 versus 18.3?

edited Jan 29, 2019 4:07AM in Oracle Text (MOSC) 7 commentsAnswered

Hello and a happy new year to everyone!

I am trying to analyze a strange perfomance difference between an Oracle 12.1 and an Oracle 18.3 installation and could use some advice how to narrow these issue down.

Issue:

When importing one of our databases using IMPDP the processing of the domain index of a table with about 90.000 documents takes 2 hours on Oracle 12.1 - thats okay.

When importing the same dump as before on Oracle 18.3 the domain index processing needs twice as much time, i.e. 4 hours.

I retried the import several times, always with the same duration (deviations only in the range of a few minutes).

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