Date: Fri, 03 Nov 1995 08:36:15 -0500 From: Paul Fox <pgf@foxharp.boston.ma.us> To: freebsd-questions@FreeBSD.org Subject: Re: what's counted in RSS and VSZ? Message-ID: <199511031336.IAA09256@gutso.foxharp.boston.ma.us> In-Reply-To: davidg's message of Thu, 02 Nov 1995 19:31:51 -0800. <199511030331.TAA02964@corbin.Root.COM>
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> > - how can RSS ever be bigger than VSZ?
>
> Except for the program binary itself, the VSZ doesn't include mapped files.
> Shared libraries are mapped files. I thought about "fixing" this, but it is
> very complicated and probably has too much associated overhead. I may still
> try to fix it for a future release of FreeBSD.
>
> > - why are the VSZ numbers for the two different builds different?
>
> In the shared case, the VSZ doesn't include the code in the shared
> libraries. In the non-shared case it does.
>
thanks for the replies. the reason i asked is that i'm trying to guesstimate
the future memory footprint (text+data+bss+heap) for an app that will not
be running under freebsd at all (when i'm finished porting it), but which
does run there now. assuming similar compiler, similar library size, i
guess the number i should be using is the non-shared VSZ number...
thanks.
paul
---------------------
paul fox, pgf@foxharp.boston.ma.us (arlington, ma)
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