max heap exhausted

[Hal Daume III]

I'm sorry, I meant -M, not -H.

--
Hal Daume III

 "Computer science is no more about computers    | hdaume@isi.edu
  than astronomy is about telescopes." -Dijkstra | www.isi.edu/~hdaume

On Mon, 15 Apr 2002, Sigbjorn Finne wrote:

> Have a look the the -M RTS option (default is 256M
> on Win32, not unlimited.)
> 
> --sigbjorn
> 
> ----- Original Message -----
> From: "Hal Daume III" <hdaume@ISI.EDU>
> To: "GHC Users Mailing List" <glasgow-haskell-users@haskell.org>
> Sent: Monday, April 15, 2002 08:04
> Subject: max heap exhausted
> 
> 
> > What does it mean when my program tells me:
> >
> >   "fatal error: RTS exhausted max heap size (268435456 bytes)"
> >
> > ?
> >
> > My initial understanding was the GHC allocated (perhaps dynamically) a
> > heap of unlimited size (at least so says +RTS -help) and when I run my
> > (long memory grabbing) program without any RTS flags it gets about 1/4 of
> > the way done (on my Windows box -- this is ghc5.03 the original
> > snapshot) and then tells me this.
> >
> > So I go to increase the heap (i have 1g of ram) so I say "+RTS -H512m" and
> > immediately it comes back to me with the same error (presumably in trying
> > to allocate the heap?).
> >
> > I think there are really two error messages going on here: the first is
> > truly that the heap is exhausted, but the second is more of "I can't
> > allocate that much".  Am I correct?  If so, why not?  I can run it with
> > -H300m, but not -H350m (on the first RTS doesn't complain until later; on
> > the second it complains immediately).  How can I give my program more heap
> > and why does -H300m give it more heap than without any RTS options which
> > should give it unlimited heap?
> >
> >  - Hal
> >
> > --
> > Hal Daume III
> >
> >  "Computer science is no more about computers    | hdaume@isi.edu
> >   than astronomy is about telescopes." -Dijkstra | www.isi.edu/~hdaume
> >
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>