You can setup MaxFetchSize=10 for a particular VO instance in the data model of the ApplicationModule. Go to "Data Model" page of the ApplicationModule definition, select the necessary VO instance and click the button "Edit ..." above the list of VO instances. "Edit View Instance" dialog will open. Go to "Tunning" page of the dialog and configure "Only up to row number" = 10. In this way you will setup MaxFetchSize=10 for this VO instance only. The other VO instances of the same VO definition will remain unaffected.