On 12.1 and facing performance problems ?

It might be related to Adaptive Features which are a set of capabilities that enable the optimizer to make run-time adjustments to execution plans and to adjust plans for future executions based on the results of previous executions.

Please check Mike’s Blog so you can apply the 12.2 behaviour on 12.1 DB.


Hopefully, patches 22652097 and 21171382 will be incorporated in the next database proactive bundle patch. So keep checking MOS note 1937782.1.

Check the options available to you depending on what you’re upgrading from: https://blogs.oracle.com/optimizer/entry/optimizer_adaptive_features_and_upgrading



Author: reguchi

Oracle ACE, OCP 12c, OCE 12c MAA, OCE Exadata, RHCE, AWS CSAA, OCI CSAA. Technology geek, homebrewer, dad.

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