[petsc-users] Large matrixes on single machine

[Bartłomiej W]

Hello,

I was trying to allocate a sparse AIJ matrix of over 800 entries

MatSeqAIJSetPreallocation(L,PETSC_NULL,nnz);

(with proper nonzeros vector)
results in an
Maximum memory PetscMalloc()ed 315699888 OS cannot compute size of entire process
(in ubuntu)

Can this be dealt with somehow?
I am aware of the 4gb limitation of memory.

If not, how would one run it on several machines?

Thank You very much.

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