Adaptive Features or: How I Learned to Stop Worrying and Troubleshoot the Bomb [DOAG 2016]

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Date/Time
Date(s) - 16/11/2016
11:00 am - 11:45 am

Location
DOAG Konferenz 2016

Categories


Adaptive Dynamic Sampling, Adaptive Execution Plans, SQL Plan Directives: these new features are the new performance troublemakers when migrating databases from 11g to 12c. The optimizer uses them to seek for the perfect execution plan, but does it always succeed?
How to identify if an upgraded database starts suffering of aggressive dynamic sampling?
How to check if a query execution plan is the result of a SQL plan directive?
Is it better to disable these features completely or selectively just for a specific query?
Having a clear understanding of the new adaptive features is crucial for every DBA in order to achieve a successful upgrade to 12c.
This session will focus on the first steps required to quickly troubleshoot performance issues due to the adaptive features.

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Ludovico

Oracle ACE and Senior Consultant at Trivadis SA
Ludovico is an Oracle ACE Director, frequent speaker and community contributor, working as Senior Database Specialist for Trivadis, Switzerland.

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