Mem usage in Mac OSX

Alexandre Julliard julliard at
Tue Oct 3 04:36:35 CDT 2006

Robert Shearman <rob at> writes:

> Nick Burns wrote:
>> Does Linux have the same mem problem? -- does top show like 4GB of
>> VSIZE on app start?
> The numbers seem bogus since 32-bit apps can only take up 4Gb of
> VM. Wine does reserve 1.5Gb of VM on startup to ensure no system
> libraries are present in the area needed for Win32 apps and libraries.

Actually Wine also reserves the high memory addresses, so the total is
more like 3.5Gb. The real question is why do the Apple libraries need
to allocate another 500Mb or so after startup.

Alexandre Julliard
julliard at

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