Re: [Caml-list] memory usage

["Till Varoquaux" <till.varoquaux@gmail.com>]

It is hard to tell without any more informations but sometimes the
garbage collector needs some gentle proding:

OCaml handles it's own memory but can be a bad citizen when it comes
to making room for others. Unfortunately ocaml also has a bit of a
double personality: it doesn't know much about resources used in
external libraries or even in some of its own library (e.g. on a 32
bits machine running out of addressable space because of
Bigarray.map_file is not unheard of).

If this is your problem, you can either sprinkle your source code with
calls to Gc.major or tweak it using Gc.set.

Till

On Fri, Jul 11, 2008 at 8:49 PM, Jean Krivine
<jean_krivine@hms.harvard.edu> wrote:
> Dear list members,
>
> I am trying to run a stochastic simulator (written in ocaml) on a huge
> data set and I have the following error message:
>
> sim(9595) malloc: *** mmap(size=1048576) failed (error code=12)
> *** error: can't allocate region
> *** set a breakpoint in malloc_error_break to debug
> Fatal error: out of memory.
>
> My system:
>
> Mac Pro running OS X 10.5.4
> Processor:  2 x 2.8 GHz Quad-Core Intel Xeon
> Memory:  10 GB 800 MHz DDR2 FB-DIMM
>
> Does someone know what happened? Do you have any idea of any parameter
> I could tune in order to avoid that?
>
> Thank you very much!
>
> Jean
>
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