Use this attribute, together with the InitialCapacity attribute, to set the initial parameters on the underlying hashmap that stores region entries. When the number of entries in the map exceeds the LoadFactor times current capacity, the capacity is increased and the map is rehashed. You get the best performance if you configure a properly sized region at the start and do not have to rehash it.

This declaration sets the region's load factor to 0.75 :

<region-attributes load-factor="0.75">