Allocation memory problem with a .NET application

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Good Morning,

I have a C# .NET 32 bit compiled application running on a windows x64
machine
(the app is compiled at 32 bit because it has to embed a 32 bit DLL).
I expected
that every .NET process instance of this kind, could allocate 4 GB of
memory on
the x64 machine.

Instead, while a single process instance *seems* to be able to
allocate about 5.7
G (!), if I start e.g. four processes, every process seems to be able
to allocate
only ~ 1.3 G, even though my machine has 16 GB RAM. It seems that the
sum
of the single processes allocated memory amount can not be greater
than ~ 5.x
GB.

I tried to look around on the net, but did not find any useful
information.

Can anyone help me, explaining this strange behaviour ?

thank you very much in advance :)

Bruno

.

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