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

Where, when, and who to call for help


Okay, now that you know the major responsibilities as a DBA, when should you ask for help? When would you know something is wrong? One issue that every DBA dreads is when end users complain that the database is slow. It doesn't matter if you are sitting in your office and the database seems to be running perfectly well. Every script you run reveals no issues or distinguishable slowness. So what are those end users talking about? If the end users have an issue, then you now have a problem. And that particular problem is called response time; this subject will be explored further in Chapter 8.

Components (at several levels of the technology stack) that slow things down for the database can include the network, operating system, application servers, and of course hardware-specific problems. Start an SQL trace to help come up with an error message that will give more clues to the problem. Please don't assume it is someone else's problem.

If you encounter corruption...