49016e78_rver_Features___Hack_Mine_Wiki__Description
[Property] avgPctUsageMax [Default Value] .90 [Description] 
Triggers a "grow" when exceeded by "avgPctUsage." The percentage leftover (1-avgPctUsageMax) could be thought of your safety buffer; the larger it is, the less likely you'll have "area thrashing" before the avgPctUsage reflects the actual demand for areas.
Server Features - Hack/Mine Wiki
Description