Dear Volker,
thank you for your answer. Could you please explain what you mean? 

If it helps, I seem to have "swap"?:
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

On Wednesday, May 30, 2018 at 6:53:14 PM UTC+2, Volker Braun wrote:
>
> You probably need swap to back the anonymous mmap that is the gap 
> workspace. If you don't have swap you wont' be able to use all available 
> ram.
>
>
> On Tuesday, May 29, 2018 at 11:04:22 PM UTC+2, sbran...@web.de wrote:
>>
>> Dear all,
>>  
>> I am running some calculations with libgap. At some point I get
>> {{{
>> gap: cannot extend the workspace any more!
>> }}}
>> and sage quits disgracefully. 
>>
>> Yet my memory manager claims that I still have 10 GB of free RAM. 
>>
>> Is there a way to tell libGAP  to extend the workspace? / raise the 
>> memory limit?
>>
>

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