-Xminf
/ -Xmaxf
Specifies the minimum and maximum proportion of the heap that must remain free after a global garbage collection (GC) 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
.
Syntax
Setting | Effect | Default |
---|---|---|
-Xminf<value> |
Set minimum free space | 0.3 |
-Xmaxf<value> |
Set maximum free space | 0.6 |
The value range is 0.0 - 1.0.
- For the
gencon
GC policy, the values apply only to the Tenure part of the heap and only at global GC points. - For the
optthruput
andoptavgpause
GC policies, these values apply to the whole heap at every GC point.