[petsc-users] insufficient virtual memory?

[Barry Smith]

   PETSc gets almost all its memory using the C malloc system calls so it is unlikely that this Fortran error message comes from PETSc code. My guess is that you have some Fortran arrays declared somewhere in your code that are large and require memory that is not available. 

  Barry


> On Feb 17, 2021, at 7:23 PM, Park, Heeho via petsc-users <petsc-users at mcs.anl.gov> wrote:
> 
> Hi PETSc developers,
>  
> Have you seen this error message?
>  
>       forrtl: severe (41): insufficient virtual memory
>  
> We are running about 36 million degrees of freedom ( ~ 2.56 GB) and it is failing with the error message on our HPC systems.
> Ironically, it runs on our laptop (super slow.)
>  
>       type: seqbaij
>       rows=46251272, cols=46251272
>       total: nonzeros=323046210, allocated nonzeros=323046210
>       total number of mallocs used during MatSetValues calls=0
>           block size is 1
>  
> Does anyone have experience encountering this problem?
>  
> Thanks,
>  
> Heeho Daniel Park
> 
> ! ------------------------------------ !
> Sandia National Laboratories
> Org: 08844, R&D
> Work: 505-844-1319
> ! ------------------------------------ !

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