Database Install/Upgrade/Opatch (MOSC)

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Executions plans and 10g to 11g upgrade -Standard Edition

edited Oct 30, 2015 10:00AM in Database Install/Upgrade/Opatch (MOSC) 1 commentAnswered

Hello

We are in the process of planning to upgrade our 10.2.0.4 database to 11.2.0.4

Please note that both the source and target database is STANDARD EDITION

We have statspack configured on the 10g database

we have a few questions as below:

1) How can we capture the execution plan that currently are being used in the 10g database?

2) Once we upgrade the database to 11g, the optimizer will use new (and hopefully) better execution plans. Correct?

3) Is there a way we can ensure that even after migrating to 11g, the optimizer uses the same execution plans as 10g without tinkering with the OPTIMIZER_FEATURES_ENABLE init.ora parameter as apparently that could lead to some other issues which are fixed in 12c)

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