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

[Jed Brown]

On Thu, Mar 1, 2012 at 10:40, Derek Gaston <friedmud at gmail.com> wrote:

> 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 ;-)
>

When you run with -snes_view, you see the number of nonzeros for all
matrices in the system. Third order elements are really expensive.
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