Persistence of Automatically
If using the server parameter file (spfile)
for the Oracle database, the sizes of the automatically tuned
components across instance shutdowns
will be retained. Therefore, the system has to learn the
characteristics of the workload each time an instance is
started. It can start with information from the last instance
shutdown and continue evaluating the new workload.
will now be shifted
to automated maintenance tasks.
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, a
resource plan can be used to
control resource consumption of these tasks. When the time
elapses, the database can switch to a different resource plan
with a lower resource allocation.
As explained in the previous section,
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_task_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.