||Scaling Enterprise Java on 64-bit Multi-Core X86-Based Servers|
|Subject:||Your information on defaults seems outdated|
As of J2SE 5.0, the default max heap is no longer 64M. For server class machines (as according to http://java.sun.com/j2se/1.5.0/docs/guide/vm/server-class.html ), which the 64-bit server would be, the VM would by default be the server VM and the heap boundaries would be (excerpted from http://java.sun.com/j2se/1.5.0/docs/guide/vm/gc-ergonomics.html ):
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