[petsc-users] Insufficient memory when using GMRES + Boomeramg

[Matthew Knepley]

On Wed, Mar 26, 2014 at 9:59 AM, TAY wee-beng <zonexo at gmail.com> wrote:

> Hi,
>
> I am running a CFD solver. The Poisson eqn was originally solved using
> HYPRE's geometric multigrid.
>

Is this on a structured grid?

  Matt


> Recently, I tested it with Boomeramg as the preconditioner and GMRES as
> the ksp solver. There's a 20% increase in speed.
>
> However, when I increased the grid resolution, I got the out of memory
> error. Changing the solver back to HYPRE solved the problem.
>
> So does GMRES  + Boomeramg used more memory than other solvers? Are there
> alternatives?
>
> Thank you.
>
> --
> Yours sincerely,
>
> TAY wee-beng
>
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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