Page Size Considerations
You can use page size for data services and form services (application stack) to indicate the number of records that the AIS Server fetches at a time via the HTML Server. Using this functionality may help when the data or form request expects a large data set. Instead of requesting all of the records in a single operation, it can request a chunk at a time, collect (buffer) them on the AIS Server, and then return the complete set of records in the response to the caller.
For a form service, it is important to consider where to place the "Return Form Data" action when returning grid data. If your application stack contains multiple forms with grids, and you want to return all the data for a grid using paging, you must place the "Return Form Data" after the Find action.