I upgraded the swap to 40 GB.  The computation gets through now. 
Thank you.

On Thursday, May 31, 2018 at 7:27:13 AM UTC+2, jori.ma...@uta.fi wrote:
>
> On Wed, 30 May 2018, sbran...@web.de <javascript:> wrote: 
>
> > This is how my memory looks like before gap crashes: 
> > 
> > Every 5.0s: free -m                                     Wed May 30 
> 22:03:55 2018 
> > 
> >                       total        used        free     shared  
> buff/cache   available 
> > Mem:          15960        2539       11498         300        2021      
> 12845 
> > Swap:          8007           0            8007 
>
> I suggest that you try to increase swap to 2 times on RAM. Something like 
> this might work (as root): 
>
> head -c $((12*1024**3)) /dev/zero > /home/SWAPFILE 
> chmod og= /home/SWAPFILE 
> mkswap /home/SWAPFILE 
> swapon /home/SWAPFILE 
>
> -- 
> Jori Mäntysalo

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