[plt-scheme] GC Warning ...

From: Matthew Flatt (mflatt at cs.utah.edu)
Date: Tue Apr 11 10:05:44 EDT 2006

At Tue, 11 Apr 2006 09:33:23 -0400, "David J. Neu" wrote:
> Does anyone know if there is a limit on how much memory mzscheme can
> address on a 32 bit machine, and if so what it is?


But the amount of memory that the GC can allocate may be smaller, due
to fragmentation, including the placement of the C stack, etc. As far
as I know, such fragmentation would be the only reason the GC couldn't
allocate 4GB, but I'm not sure.

> > Running top shows plenty of physical memory available.

Well, virtual memory can be allocated without occupying physical
memory. For example, if you allocate a large block of memory and don't
touch it, the OS probably won't page it in. But probably you know that
it isn't the case in your program.


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