Can it be possible for one application to reside in two system profile??
Second---Where i can get default aggregration for measure like for rate measure we have default percentage.
An agent can only connect to one System Profile. The application that an agent collects data for is typically only in one System Profile and all agents for that application would typically be configured to that specific system profile. https://www.dynatrace.com/support/doc/appmon/admin...
(There may be rare cases in which a part of the application is configured and reports to one system profile and another part is configured to another system profile, however, this usually isn't recommended as it creates difficulty in monitoring and analyzing the application.)
Could you clarify your second question?
Here's a link to charting, measures, resolution and aggregation that might be helpful; https://www.dynatrace.com/support/doc/appmon/appli...
Hope this helps!