A memory slot allocation request specifying a requested number of memory slots is received from a requestor assigned to a particular class among a plurality of classes. It is determined whether allocation of the requested number of memory slots to the requestor results in satisfaction of resource allocation constraints for the plurality of classes. The resource allocation constraints include a first and second threshold for each class that determine how many memory slots can be allocated to each class. Based on determining that allocation of the requested number of memory slots to the requestor results in satisfaction of the resource allocation constraints, the memory slot allocation request is granted. The granting of the memory slot allocation request includes allocating the requested number of memory slots to the requestor.