Oracle Tuning – Stabilizing Performance with SQL Baselines when Upgrading Database

Publicado em: 16 Fevereiro 2023
no canal de: SkillBuilders

1,937

Oracle Certified Master DBA John Watson will demonstrate identifying a problem caused by an upgrade from Oracle 11g to 19c, capturing a sql plan baseline on 11g, transferring the baseline to 19c, and showing that the 11g plan is carried through and performance returns to normal. You'll learn how to use sql plan baselining to maintain consistent performance when upgrading an Oracle Database!

Chapters:
00:00 - Agenda and Introduction
02:32 - Issues with DB Upgrades
05:44 - The Concept of Baselining
12:24 - Baselining License Issues
15:37 - SQL Changes on Upgrade - DEMONSTRATION
32:19 - Stabilize the Entire Workload
36:25 - How Does it Work? - DEMONSTRATION
50:52 - Summary and Questions

Background - We all know what happens with performance when you upgrade: 90% of your SQLs run the same, 9% run better, and for 1% performance drops through the floor. And if you are unlucky, it is the 1% that matter. The solution is SQL Plan Baselining. Baselines stabilize your execution plans through the change, letting you upgrade safely. The basic functionality is now available for SE2 as well as EE.
Recommended Prerequisite: How to Read an Execution Plan

Presenters: John Watson, Oracle Certified Master DBA, Dave Anderson, SkillBuilders Founder and Oracle Technologist

Audience: Oracle DBAs and Anyone Interested in Oracle Database Upgrades and Performance

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