||Oracle Tips by Burleson
Oracle10g Grid Computing
Chapter 17 -
Oracle’s Grid Integration Technologies
the release of 10g, you have more options in assigning the resource
groups to the sessions automatically. With the new features available
in 10g, it now becomes possible to configure DRM to automatically
assign the consumer groups to sessions. Creating mappings between the
session attributes and consumer groups does this. It is also possible
to prioritize these mappings and create precedence in the event of
basically two types of session attributes that control the assignment
of the resource group: login attributes and run-time attributes. The
login attributes are evaluated at the time of session login, based on
their appropriate resource group as assigned to the session. A session
that is already up and running can be assigned to a different resource
consumer group. Both these changes take place automatically. This
provision of automatic mapping provides better control of resource
usage and changes can be effected without the intervention of the
administrators. It becomes possible to embed the directives in the
application code itself. Based on the application needs, type of
client program, operating system user level, and the client machine,
the resource groups can be assigned and re-assigned.
There is a
new procedure called set_group_mapping within the
dbms_resource_manager that helps to map the session attributes to a
consumer group. These attributes are of two types: login attributes
and runtime attributes.
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