[petsc-users] Number of Matrices with -snes_mf and -snes_mf_operator

[Derek Gaston]

On Thu, Mar 1, 2012 at 9:37 AM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> snes_mf_operator has one MFFD (almost free), your assembled matrix, and
> the factored matrix created by the preconditioner.
>

I see, so one of those is the MFFD which really isn't taking up much space.
 I suppose that's why going from 2->3 matrices ~doubled the memory.

So there's probably nothing wrong here... those matrices are needed and
really do take up that much memory... damn ;-)

Derek
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