I need clarification regarding adding Large DataPage to whitelist
As per Pega Documentation
After you create the data page, declare it as a large data page.
To do this, edit the whitelist for the List of data pages that are available offline but are not referenced directly in the UI.
Add the name of the data page followed by ;large. For example, to declare the data page D_FieldMappings as large, enter D_FieldMappings;large in the HTML source. Add additional large data pages on separate lines.
So my question is adding large DataPages but referenced in UI in white list won't help to improve Performance? even though is datapage referenced in UI also added in to whitelist- still synchronization required- synchronization takes place?[since added to whitelist]
The only way to declare a data page as large is through the white list. There is no way, as far as I know, to declare a data page as large on the data page rule form. Therefore, regardless of whether the data page is declared in a UI rule or not, it must be entered into the white list if you are going to declare it as a large data page as this is the only mechanism available for declaring a large data page.
I am not certain what version of Pega you are using, but the following link may be of assistance: