MatLoad a large matrix into SEQAIJ

Matthew Knepley knepley at
Fri May 15 12:51:22 CDT 2009

I have not seen this. I would recommend upgrading.


On Fri, May 15, 2009 at 8:58 AM, SUN Chun <Chun.SUN at> wrote:

>     Hello PETSc developers,
> I was trying to MatLoad a large matrix into a serial machine. The matrix is
> about 6G on disk (binary). I'm seeing signal 11 on MatLoad phase. However, I
> was able to load other smaller matrices (less than 1G) in serial (although I
> haven't binary-searched to find out what is the critical size of the crash).
> Also, I was able to load the 6G matrix when I ran with 4 cores, meaning
> SEQAIJ type has become  MPIAIJ type. BTW I built and ran PETSc on both
> 64-bit lnx86_64 machines.
> I'm not sure if you have seen this. I'm not sure if this is a bug because
> I'm still using 2.3.3 instead of 3.0, and I also suspect I might have missed
> something on build or run. Have you seen this?
> Thanks,
> Chun

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