[petsc-users] boomeramg memory usage

Klaij, Christiaan C.Klaij at marin.nl
Wed Jul 11 03:48:08 CDT 2012

I'm solving a 3D Poisson equation on a 200x200x100 grid using
CG and algebraic multigrid as preconditioner. I noticed that with
boomeramg, the memory increases as the number of procs increases:

1 proc:    2.8G
2 procs:   2.8G
4 procs:   5.2G
8 procs:   >12G (max reached, swapping)

The memory usage is obtained from top. When using ml or gamg (all
with PETSc defaults), the memory usage remains more or less
constant. Something wrong with my install? Some Hypre option I
should set?

dr. ir. Christiaan Klaij
CFD Researcher
Research & Development
E mailto:C.Klaij at marin.nl
T +31 317 49 33 44

2, Haagsteeg, P.O. Box 28, 6700 AA Wageningen, The Netherlands
T +31 317 49 39 11, F +31 317 49 32 45, I www.marin.nl

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