JVM_MAX_HEAP_SIZE environment variable

The JVM_MAX_HEAP_SIZE environment variable can set a non-default upper limit on the size of the heap for the Java virtual machine.

1  setenv JVM_MAX_HEAP_SIZE  size
size
is a positive integer that specifies the maximum size (in megabytes).
For example, the following command sets the maximum heap size at 12 MB:
set JVM_MAX_HEAP_SIZE 12

If you do not set JVM_MAX_HEAP_SIZE, 16 MB is the default maximum size.