Book Image

Oracle SQL Developer

By : Susan Harper
Book Image

Oracle SQL Developer

By: Susan Harper

Overview of this book

At times, DBAs support 100s of databases at work. In such scenarios, using a command-line tool like putty adds to the difficulty, while SQL Developer makes the life of a developer, DBA, or DB architect easier by providing a graphical user interface equipped with features that can bolster and enhance the user experience and boost efficiency. Features such as DBA panel, Reports, Data Modeler, and Data Miner are just a few examples of its rich features, and its support for APEX, REST Services, timesten, and third-party database drivers demonstrate its extensibility. You may be a newbie to databases or a seasoned database expert, either way this book will help you understand the database structure and the different types of objects that organize enterprise data in an efficient manner. This book introduces the features of the SQL Developer 4.1 tool in an incremental fashion, starting with installing them, making the database connections, and using the different panels. By sequentially walking through the steps in each chapter, you will quickly master SQL Developer 4.1.
Table of Contents (21 chapters)
Oracle SQL Developer
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
11
Working with Application Express
Index

Resource manager


The Oracle database resource manager (the Resource Manager) enables us to optimize resource allocation among the many concurrent database sessions. When database resource allocation is done by the operating system, we may encounter the following problems with workload management:

  • Excessive overhead results from the operating system context by switching between Oracle database server processes

  • The operating system de-schedules database servers while they hold latches, which is inefficient

  • The operating system distributes resources equally among all active processes and cannot prioritize one task over another

  • Inability to manage database specific resources, such as parallel execution servers and active sessions