IBM BPM, V8.0.1, All platforms > Tuning > Tuning parameters > Java tuning parameters
Java heap sizes
Use the appropriate Java™ heap size for production environments. To change the default Java heap sizes, set the Initial Heap Size and Maximum Heap Size values explicitly on the Java Virtual Machine administrative panel.
If you use the generational concurrent garbage collector, the Java heap is divided into a new area (nursery) where new objects are allocated, and an old area (tenured space) where longer-lived objects reside. The total heap size is the sum of the new area and the tenured space. You can set the new area independently from the total heap size. Typically, set the new area size to between 0.25 and 0.5 of the total heap size. The relevant parameters are the following:
- -Xmns<size> : initial new area size
- -Xmnx<size> : maximum new area size
- -Xmn<size> : fixed new area size