"If the maximum heap size has not been set with -Xmx, then set it as fraction of the size of physical memory, respecting the maximum and minimum sizes of the heap."
"-XX:MaxRAM does not define the heap size directly. Instead this parameter overrides the actual amount of physical RAM when calculating the heap limits basing on ergonomics."
"If the maximum heap size has not been set with -Xmx, then set it as fraction of the size of physical memory, respecting the maximum and minimum sizes of the heap."