Re: 64 bit programming environment

Hello,
I'm a j2ee programmer, and im thinking of getting a 64bit vista machine,
i was wondering, will i still able to use applications such as netbean, and so on within
64bit or should i go with 32bit?
If anyone having any issues with 64bit programming platform, pls let me know.

Dear Frank,
As you might understand, vitual memory is a seconday concept of memory mapping...I was primarily concerned about sap APIs being able to map into 64 bit RAM, which means the first 32 BIT are the address space as against the 32 bit add-ons in which the first 16 bit form the address space.  so the addressable memory locations in RAM would be drastically reduced.  As a result, if you are running a 32 bit API it can't map into memory space beyond 4GB, in which case, it will push some of the data from the first 4GB of RAM into virtual memory and load into the RAM, but not completely.  Only the active part of the add-on using a 32 bit API would load into the 4GB memory space and the rest would load into Virtual memory, which is nothing but a swap file sitting on the HDD.  Now the HDD retrieval and write speeds are highly cripled as compared to those of RAM.  Hence, my question.  So, with Roberto answering the required part of my question, it would be of no good use to have a 64 bit H/W and a 64 Bit OS if my APIs don't support 64 Bit execution as they will not load beyond 4 GB memory space.
This is a bit of murky concept as this is a tradeoff between speed and possiblity...LIke you said, even if a 64 bit OS loads a 32 Bit API it will still load it into the virtual memory if the first 4GB of RAM are occupied by other processes, but this is a compromise of possible RAM speed if the API could access all the RAM space, which would have been possible only if it were a 64 BIT API....
I was only hoping for a better world out there...
Regards,
Kamesh

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