Oracle 10g Automated Maintenance Tasks Oracle Tips by Burleson Consulting

Persistence Of Automatically Tuned Values

If the server parameter file (spfile) for the Oracle database is used, it will remember the sizes of the automatically tuned components across instance shutdowns. This allows Oracle to learn the characteristics of the workload each time an instance is started. It can start with the information from the last instance shutdown and continue evaluating the new workload.

Automated Maintenance Tasks

Oracle Database 10g is designed to handle routine maintenance tasks and schedule them at certain times of the day or week when the system load is low. For the designated time period, the use of a resource plan to control resource consumption of these tasks can be utilized. When the time elapses, the database can switch to a different resource plan with lower resource allocation.

Resource Management

Oracle Database 10g makes use of resource plans for different tasks.  At the time of database installation, a Resource Manager consumer group called auto_task_consumer_group is predefined. Similarly a Scheduler job class, auto_tasks_job_class is also defined based on this consumer group. gather_stats_job is defined to run in the auto_task_job_class  job class.

OEM has made quantum leaps in assisting the Oracle professional with creating an automated monitoring and performance display facility.  The main points of this section include:

§         OEM interfaces with the AWR to allow for the intelligent display of important performance metrics.

§         The OEM performance screens are design in an intuitive top-down fashion and require little training to use.

§         The DBA can create customized exception reporting mechanisms allowing OEM to send a notification in time to correct an issue before it causes a performance problem.

§         The ASH component of AWR allows to the DBA to view detailed Oracle session information within OEM.

The next section will present information on Oracle Tuning Techniques.

---

This is an excerpt from my latest book "Oracle Tuning: The Definitive Reference".  You can buy it direct from the publisher for 30%-off and get instant access to the code depot of Oracle tuning scripts: