Re: [Help-glpk] xmalloc: no memory available

[Matthieu Bollot]

Le Mardi 18 décembre 2007 à 23:17 +0300, Andrew Makhorin a écrit :
> > I've got a model which needs a lot of RAM, event with a few datas, and
> > I've got a "xmalloc: no memory available". But it seems that it doesn't
> > use all my RAM is it limited to 512RAM or something ? (may be it's
> > freebsd which limits it ?)
> 
> > Have you got any advice about it ?
> 
> > I can see 3 possibilities (may be 4):
> > - glpsol using all my RAM (and my swap). --memlim nnn seems to allow
> > less RAM but not more RAM.
> > - glpsol doing some clustering. Is there any project about it ? any way
> > to do that ?
> > - change my model (of course) but it's not the purpose of what I should
> > do.
> > -I've got 7 constraints, may be it would be possible to separate
> > them/stock them and merge them ? (I don't really know how glpsol works
> > but it seems to be possible)
> 
> On which stage this happens? On generating the model or on solving it?
> 
> 
On solving it. The file is about 30 lines long. glpsol works for about
3-4 minutes until 400Mo of RAM (but not sure about the real value I can
watch them exactly if it is useful)

And it seems that it is able to run all the "subject to" but after that
I've got the malloc error.

I mean that on log I've got :
subject to const1
subject to const2
...
subject to constx
subject to consty
malloc error

and withtout consty I've got
subject to const1
subject to const2
...
subject to constx
malloc error