first use extracted data source and create worksheets and also don't pull unwanted dim/measure from db.
If you need some dim/measure in feature then pull and hide unused data.when you handle large data then workbook will load and then only view open.
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First thank you for the response. a) we are using extracted data. b) we are hiding all unused fields/data.
The issue is with Tableau. When you have "hidden" worksheets on a dashboard, Tableau still loads all data for all worksheets, irrespective of hidden or not. So for every worksheet you have on dashboard, take the independent loads times and add together to get total dashboard load time. I went to plan B
Should be something Tableau updates for future use, IMHO