Fixed 15 Minutes Tile Refresh
Dashboard tiles are scheduled to refresh every 15 minutes and we can't change it.
With Power BI connected to on premises SSAS through gateway; queries are sent to the SSAS box every 15 minutes. If cube/data source is processed/refreshed once or twice a day; these 15 mins queries seem to be stressing out the on prem box and is waste of resources. Imagine if there are dozens of workspaces with several Dashboards and quite handful of dashboard tiles in each.
Also, I recon if we adapt SSAS PAAS model where we are charged by QPU (Query Processing Unit) this behavior will cost the tenants if they don't refresh their data too often.