Scale-out tenant settings
Scale-out tenant settings are configured in the tenant settings section of the Admin portal. For information about how to get to and use tenant settings, see About tenant settings.
Scale out queries for large semantic models (Preview)
For semantic models that use the large semantic model storage format, Power BI Premium can automatically distribute queries across other semantic model replicas when query volume is high. Scale-out is enabled on a tenant by default.
For more information, see Power BI semantic model scale-out.