In an example, method of managing hosts across a plurality of virtualization management servers, each of the plurality of virtualization management servers managing a plurality of the hosts, each of the hosts configured with virtualization software executing at least one virtual computing instance is disclosed. The method includes deploying, by a rescue service, a rescue agent on each of the plurality of virtualization management servers; obtaining host inventories and configurations at the rescue service for the plurality of virtualization management servers; assigning each of the plurality of virtualization management servers to a category of a plurality of categories based on configuration maximums of the plurality of virtualization management servers; and updating rescue storage managed by the rescue service to monitor resource usage of the plurality of virtualization management servers based on assigned category and the host inventories.