For better performance, user interface zones should be initially collapsed when not required for 90% or more of business processes. The initial state of zones (collapsed or not) can be controlled via the "Portal Preferences" tab on the User portal.
The number of records returned to the user interface for a zone should be limited to 50 rows when building custom zones against large transactional tables.
UI Map schemas should be specific to the displayed data. This will make sure that application will not visit all the elements that are not required for display.
A good way to troubleshoot a screen in the user interface is to go to the Preferences in the top right hand corner of the application and choose the Portal Preferences tab. Choose the appropriate portal and set all zones to "Initially Collapsed". Next, navigate back to the screen that has performance issues, expand the zones one by one, and measure the execution time of each zone. This should be an accurate step-by-step representation of the full screen execution. This testing is especially important for custom user interfaces.
For optimal user interface performance, Oracle Utilities Meter Data Management users should ensure their computer set to high performance mode so all CPU resources are used. Also, check if allocating additional memory through your browser's default settings helps improve performance.
