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

Monitoring hidden or underlying problems


It may not always be the database that is the bottleneck or slowest component of all the collective pieces that exist between the client and the application. If testing shows the database to be operating within normal benchmark limits (properly tuned), then it is time to take a look at other most-encountered performance issues. Note that some of these are Oracle components, some of them are not. Get your system administrator involved early on whenever there is a system-wide slowness problem, such as:

  • Slow or busy server

  • Underlying network

  • TNS Listener hanging (see MOS document in the box)

  • Shared server (also known as Multi-threaded server)—related issues

  • Properly functioning application

  • Advanced networking option—encryption

  • Transparent gateways

  • Connection manager

Note

Refer to TNSListener Hanging - Information to Get For Resolving or Troubleshooting [MOS Doc ID 230156.1] .

Proactive monitoring

Here is where the proactive part of the DBA in regards to tuning...