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Once you get started as an Oracle Database 10g DBA, you will find that the real world of Oracle databases is much wider and a lot more complex than that shown to you in the various courses you attend. As each new facet of the database is revealed, you may find that you are digging more and more into the heart of the software, why it works, and sometimes why it doesn t work. It is at that point that you will learn the most about the database and the software used to manage it. If you really have read everything that Oracle and other private parties have to offer, do not worry there are always new versions coming out, with new features and new approaches, practically guaranteeing an endless supply of interesting new information. After the first year or two of your DBA journey, you ll know enough to competently administrate the databases and troubleshoot typical problems that occur. If you ve also worked on your programming skills during this time (mainly UNIX shell scripting and PL/SQL), you should be able to write sophisticated scripts to monitor and tune your databases. At this stage, if you dig deeper, you ll find out a lot more about your database software that can enhance your knowledge and thereby your contribution to your organization. Oracle is constantly coming up with new features that you can adopt to improve the performance of your production databases. Although the developers, testers, and administrators are also striving mightily in the organization s cause, it is you, the Oracle DBA, who will ultimately lead the way to new and efficient uses of the new features of the database.

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In many IT fields, certification by approved authorities is a required credential for advancement and sometimes even for initial hiring. Oracle has had the Oracle Certification Program (OCP) in effect for a number of years now. The OCP is divided into three levels: Associate, Professional, and Master (the Master level requires a lab test in addition to the other requirements). Traditionally, certification was not a big issue with most organizations, especially in the face of the severe shortages of certified DBAs in the field for many years. In today s environment, though, that certification will help tremendously in underlining your qualifications for the job. Oracle provides DBA certification at the following levels Oracle Database 10g Administrator Certified Associate (OCA), Oracle Database 10g Administrator Certified Professional (OCP), and Oracle Database 10g Administrator Certified Master (OCM). Oracle provides the following descriptions of their certification programs: OCA: The Oracle Certification Program begins with the Associate level. At this apprentice skill level, Oracle Associates have a foundation knowledge that will allow them to act as junior team members working with database administrators or application developers. The exam ensures knowledge of basic database administration tasks and an understanding of the Oracle database architecture and how its components work and interact with one another. The OCA is also a prerequisite to becoming an OCP. You must take the IZ0-042 Oracle Database 10g: Administration exam to get your Oracle Database 10g Administrator Certified Associate (OCA) certificate. OCP: The exam ensures that the OCP with the 10g credential can competently address critical database functions, such as manageability, performance, reliability, security, and availability using the latest Oracle technology. The OCP is a prerequisite to becoming an Oracle Certified Master (OCM).

If this thread is started when the application starts, garbage collections will periodically be done while your native code is executed Watching or measuring the application s responsiveness can give you useful information To receive statistics about a running application, the performance monitor shipped with the Windows operating systems (PerfMonexe) can be used A performance object called NET CLR Memory provides various performance counters that are useful for this case Figure 7-4 shows how you can inspect statistics about NET garbage collection in PerfMonexe..