increse Memory For JVM

increse Memory For JVM

Dears

good day
i want to increase below JVM ,, i already did it before but when i update to the latest version 12101 its reset to its default value

JVM Memory Information

Total JVM Heap Size
2646 MB
Used JVM Heap Size
1607 MB
Free JVM Heap Size
1039 MB
Max Memory For JVM
2646 MB
Processors available to JVM
12


i follow below steps but it didn't work this time,,,

tune the Java memory in the file "wrapper.conf" located under < Home>\server\conf folder.

wrapper.conf: 


# Initial Java Heap Size (in MB)
wrapper.java.initmemory=512
# Maximum Java Heap Size (in MB)
wrapper.java.maxmemory=4096

my hardware specification
memory 20 GB
CPU 3 socket with 4 core in each , total 12 virtual processor

any idea how can i change it with the new version?????