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Oracle DBA Job Responsibilities  

Oracle Tips by Burleson Consulting

Now that we are entering the decade of server consolidation, we see a changing role for the Oracle DBA.

Winner of the
       "It's Not My Job" award
In the past, with dozens of Oracle DBA staff, important tasks were overlooked because "It's not my job".

The changing technology is changing all of this, and the 21st Century DBA will have more overall responsibility for the whole operation of their Oracle database.

The move towards server consolidation requires less DBA staff and shifting job duties as a DBA must manage dozens of instances on a single server.

The trend that will make this possible include these technology improvements:

  • Oracle server consolidation :   Server consolidation technology can greatly reduce the number of Oracle database servers.

  • Centralized DBA management :   A single server means a single copy of the Oracle software. Plus, the operating system controls resource allocation and the server will automatically balance the demands of many Oracle instances for processing cycles and RAM resources. Of course, the Oracle DBA still maintains control and can dedicate Oracle instances to a single CPU (processor affinity) or adjust the CPU dispatching priority (the UNIX :  nice:   command) of important Oracle tasks.

  • Transparent high availability :   If a CPU fails, the monolithic server can re-assign the processing without interruption. This is a more affordable and far simpler solution than Real Applications Clusters or Oracle Data Guard, either of which requires duplicate servers.

  • Scalability :   Using a single large server, additional CPU and RAM can be seamlessly added for increased performance.

  • Reduced DBA workload :   By consolidating server resources, the DBA has fewer servers to manage and need not be concerned with outgrowing their server.

So, what does this mean to the Oracle DBA:   Clearly, less time will be spent installing and maintaining multiple copies of Oracle, and this will free-up time for the DBA to pursue more advanced tasks such as SQL tuning and database performance optimization.

But the sad reality of server consolidation is that thousands of mediocre Oracle DBAs will loose their jobs to this trend. The best DBAs will continue to find work, but DBAs who were used for the repetitive tasks of installing upgrades on hundreds on small servers will be displaced.


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Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

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