-Xminf / -Xmaxf

Specifies the minimum and maximum proportion of the heap that must remain free after a global garbage collection cycle.

If the free space is above or below these limits, the OpenJ9 VM attempts to adjust the heap size so that: -Xminf ≤ free space ≤ -Xmaxf.


Setting Effect Default
-Xminf<value> Set minimum free space 30
-Xmaxf<value> Set maximum free space 60

See also