Hi @BruceAnderson ,
From the Microsoft Official document https://docs.microsoft.com/en-us/power-bi/refresh-data#setting-a-refresh-schedule , we know:
>>Note also that the configured refresh time might not be the exact time when Power BI starts the next scheduled process. Power BI starts scheduled refreshes on a best effort basis. The target is to initiate the refresh within 15 minutes of the scheduled time slot, but a delay of up to one hour can occur if the service can't allocate the required resources sooner.
The dataset in two workspaces will be refreshed one by one randomly, and the gateway will work twice, thought they are set in the same schedule refresh time.
Considering the performance, you may set schedule refresh for different datasets of workspaces at different times, make sure that you don't schedule more than max parallel refreshes for the different nodes in these capacities. Also we suggest that you first disable all refreshes on all capacities. Then slowly enable the refreshes one by one. Make sure refreshes are staggered apart (e.g. 1 hour apart), and that no more than max concurrent refreshes happen at overlapping time periods.
Best Regards,
Amy
Community Support Team _ Amy
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