Book Image

Oracle Database 11g : Underground Advice for Database Administrators

By : April Sims
Book Image

Oracle Database 11g : Underground Advice for Database Administrators

By: April Sims

Overview of this book

Today DBAs are expected to deploy and manage large databases with quality service and little to no downtime. The DBA's main focus is on increasing productivity and eliminating idle redundancy throughout the enterprise. However, there is no magic set of best practices or hard and fast rules that DBAs need to follow, and this can make life difficult. But if DBAs follow some basic approaches and best practices, tasks can be performed more efficiently and effectively.This survival guide offers previously unwritten underground advice for DBAs. The author provides extensive information to illuminate where you fit in, and runs through many of the tasks that you need to be watchful of, extensively covering solutions to the most common problems encountered by newcomers to the world of Oracle databases.The book will quickly introduce you to your job responsibilities, as well as the skills, and abilities needed to be successful as a DBA. It will show you how to overcome common problems and proactively prevent disasters by implementing distributed grid computing—scalable and robust—with the ability to redeploy or rearchitect when business needs change. Reduce downtime across your enterprise by standardizing hardware, software, tools, utilities, commands, and architectural components.This book will also help you in situations where you need to install Oracle Database 11g or migrate to new hardware making it compliant with a Maximum Availability Architecture. By the end of this book you will have learned a lot and gained confidence in your abilities. You will be armed with knowledge as to which tools are best used to accomplish tasks while proactively moving towards an automated environment.
Table of Contents (14 chapters)
Oracle Database 11g—Underground Advice for Database Administrators
Credits
About the author
About the reviewers
Preface
Index

Upgrading the Optimizer


This section deals with the general steps of upgrading and enabling the features of the Optimizer from 10g to 11g. Upgrading also includes a migration of existing 10g versions of execution plans and statistics to the new SPM method. There are many different ways of accomplishing this task, depending on your current method of gathering statistics, automatic tuning tasks, and execution plan maintenance.

Here is a basic plan of attack:

  • Capture and back up existing 10g Execution Plans and Statistics

  • Upgrade the database to 11g

  • Start the applications and allow the end users to log on to the 11g database

  • Adjust the database startup initialization parameters once the new version has been stable for at least a week

  • Capture new execution plans and new statistics

  • Evolve or verify new plans that execute better than the 10g versions

Capturing and backing up execution plans and statistics

It is assumed in this section that your existing 10g database is successfully tuned with well-performing...