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Mastering Oracle Scheduler in Oracle 11g Databases

Ronald Rood

Schedule, manage, and execute jobs in Oracle 11g Databases that automate your business processes using Oracle Scheduler with this book and eBook
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Book Details

ISBN 139781847195982
Paperback240 pages

About This Book

  • Automate jobs from within the Oracle database with the built-in Scheduler
  • Boost database performance by managing, monitoring, and controlling jobs more effectively
  • Contains easy-to-understand explanations, simple examples, debugging tips, and real-life scenarios

Who This Book Is For

This book is intended for Administrators and Developers who currently use tools like cron, DBMS_JOB, and the task manager, but who now want more control or who have a need to scale up to tools that can handle the network. Complex tasks can be built that easily control business process and enable the completion of important tasks in limited time.

The reader is expected to have some experience of Oracle Database Management, and a working knowledge of SQL and PL/SQL.

Table of Contents

Chapter 1: Simple Jobs
Creating a user
Running your Jobs
Defining arguments for your jobs
Chapter 2: Simple Chain
Chains and steps
Evaluation interval
Steps to create a chain
Hands-on with chains
DB Console
Running the chain
Tricks with chains
Manipulating the running chains
Analyzing the chain
Chapter 3: Control the Scheduler
Job creation
Job execution
Scheduler management
Chapter 4: Managing Resources
Resource consumer group
Window groups
Problems with Resource Manager
Problems that Resource Manager solves
Chapter 5: Getting Out of the Database
Installation on Windows
Installation on Linux
Upgrading the remote job agent
Silent install of the remote job agent
Preparing the database for remote agent usage
Configuring a remote agent
Multiple agents on the same host
Creating job—targeting Unix
Creating job—targeting Windows
Runtime observations of the remote Scheduler
Resource Manager
Chapter 6: Events
Monitoring job events
Event-based scheduling
Chapter 7: Debugging the Scheduler
Unix—all releases
Windows usage
Job environment
Checks to do in the database
Chapter 8: The Scheduler in Real Life
Statistics collection
How to use the calendar
Chapter 9: Other Configurations
Standby databases
Chapter 10: Scheduler GUI Tools
DB Console
Grid Control

What You Will Learn

  • Create simple as well as complex jobs and schedule their execution according to your specific needs
  • Manage jobs independently of any particular platform so that they can be moved from one system to another easily
  • Create chains to link related programs, based on contingent outcomes
  • Flag the Scheduler to raise events when unexpected events occur
  • Manage logs to find out when jobs ran and analyze the runtime behavior based on recorded execution times
  • Combine your resource manager and Scheduler to get maximum throughput for managing thousands of jobs at a time
  • Run jobs on machines that do not have a running database using the remote job agent
  • Learn to debug jobs and make sure jobs run as expected

Here is brief summary of what each chapter covers:
Chapter 1 – Simple Jobs
The goal of this chapter is to get you, as quick as possible, going with the Scheduler. In the end you will automate simple tasks that are now maintained in for example cron, task manager, or the good old DBMS_JOB package.

Chapter 2 – Simple Chain
In this chapter you will see lot of possibilities of chains with many examples and explanations. In short, all you ever wanted to know about chains but were afraid to ask.

Chapter 3 – Control the Scheduler
For you people, living in an organization that requires strict job separation, this chapter will show how to make good use of the Scheduler and apply job separation.

Chapter 4 – Managing resources
This is a very important chapter that explains how to crank up the power of a system to the limits by combining the Scheduler and resource manager. Here you will find how to get the best out of your system.

Chapter 5 – Getting out of the database
This chapter will be of great help in setting up remote external jobs, introduced in oracle 11g. How is this related to the old fashioned local external jobs that we have got to know since oracle 10g and why we should get rid of the old external jobs? Get your answers here.

Chapter 6 – Events
This chapter helps the reader to get a firm grip on events and explains how to make good use of events. Events sound like voodoo, but in the end are an extra tool found in the Scheduler.

Chapter 7 – Debugging the Scheduler
When the jobs get more complicated it gets harder to understand why something works out differently than planned. This chapter gives the reader a new look at how to follow and debug Scheduler jobs.

Chapter 8 – The Scheduler in Real Life
Here you will find some creative implementations of more or less common tasks – this time implemented using the Scheduler. This chapter gives working code with clear explanations. This broadens the horizon and will take down barriers that might exist between other environments and oracle.

Chapter 9 – Other configurations
This chapter shows how the Scheduler can be used in other configurations like standby databases and RAC.

Chapter 10 - Working remotely
This chapter shows how the Scheduler can be managed and monitored remotely through a web interface.

In Detail

Scheduler (DBMS_SCHEDULER) is included in Oracle Database and is a tool for the automation, management, and control of jobs. It enables users to schedule jobs running inside the database such as PL/SQL procedures or PL/SQL blocks, as well as jobs running outside the database like shell scripts. Scheduler ensures that jobs are run on time, automates business processes, and optimizes the use of available resources.

You just need to specify a fixed date and time and Scheduler will do the rest. What if you don't know the precise time to execute your job? Nothing to worry about, you can specify an event upon which you want your job to be done and Scheduler will execute your job at the appropriate time. Although scheduling sounds quite easy, it requires programming skills and knowledge to set up such a powerful, intelligent scheduler for your project.

This book is your practical guide to DBMS_SCHEDULER for setting up platform-independent schedules that automate the execution of time-based or event-based job processes. It will show you how to automate business processes, and help you manage and monitor those jobs efficiently and effectively. It explains how Scheduler can be used to achieve the tasks you need to make happen in the real world. With a little understanding of how the Scheduler can be used and what kind of control it gives, you will be able to recognize the real power that many known enterprise-class schedulers – with serious price tags – cannot compete with.

You will see how running a specific program can be made dependent on the successful running of certain other programs, and how to separate various tasks using the built-in security mechanisms. You will learn to manage resources to balance the load on your system, and gain increased database performance.


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