For a single instance use, the application server should run properly on a 64-bit VM out-of-the-box, because application server does not use native stuff for normal operations.
Use -d64 in the <jvm-options> for the given domain and that should make the server use
the full 64-bit addressing. Also, make sure that the VM is 64-bit :)
For cluster profile however, the load balancer plugin needs to be downloaded separately
because it is a native shared object. I don't know what the plans are for that to happen.
Hope this helps,
Kedar
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