[petsc-dev] Bad scaling of GAMG in FieldSplit

[Mark Adams]

>
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>> Increasing the threshold results in slower coarsening.
>>
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> Hmm, I think we have to change the webpage then:
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> http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/PC/PCGAMGSetThreshold.html
>
> I read it the opposite way.
>

I will make this clear. The doc just says what it does algorithmically and
does not mention the effect. I will add that.
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