[GRASS-user] i.segment.stats memory usage error

[James Duffy]

I can't register with osgeo to submit a bug as no-one has replied with a
'mantra' for me to do so... what a convoluted bug reporting system!

And in your opinion Moritz, does it look like my workflow will not be
possible unless I find a 64bit machine with a decent amount of RAM?

Thanks for your support on this.

James

On 27 October 2016 at 20:47, Moritz Lennert <mlennert at club.worldonline.be>
wrote:

> Le Thu, 27 Oct 2016 20:33:23 +0100,
> James Duffy <james.philip.duffy at gmail.com> a écrit :
>
> > On 27 October 2016 at 17:48, Moritz Lennert
> > <mlennert at club.worldonline.be> wrote:
> >
>
> > > > Running:
> > > >
> > > > r.univar -et gp_ortho.1 zones=gp_seg_optimum_clump
> > > > output=testoutput2.csv
> > > >
> > > > Returns:
> > > >
> > > > Current region rows: 12627, cols: 23991
> > > > ERROR: G_realloc: unable to allocate 224000 bytes of memory at
> > > >        raster/r.univar/r.univar_main.c:324
> > >
> > >
> > > Ok, so the issue is with r.univar (although the issue has made me
> > > aware that i.segment.stats could be made way more memory efficient
> > > as well).
> > >
> > > How much RAM do you have on your machine ?
> > >
> >
> > It's a virtual machine which I have dedicated about 10GB.
> >
> >
> > >
> > > This warrants a bug report. Would you be willing to file one on
> > > http://trac.osgeo.org/grass ?
> > >
> >
> > I'm happy to submit it if you can guide me as to what exactly should
> > go into it please?
> >
>
> The bug report should concentrate on r.univar
>
> You should provide:
>
> - region settings (output of g.region -p)
> - info about the two maps going into the command, i.e. r.info, plus the
>   info that the segment map is an output of r.clump and thus
>   sequentially numbered
> - the error message
>
> I don't know how difficult it will be to allow for lower memory usage
> in r.univar, so we'll have to see if an improvement is possible.
>
> Moritz
>
>


-- 
*James Duffy*
PhD Researcher
Environment and Sustainability Institute
Penryn Campus
University of Exeter
Penryn
Cornwall
TR10 9FE
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