[Ipopt] MA27 memory problem

[Stefan Vigerske]

Hi,

If you increase the init_factor's you may not want to increase also the 
meminc_factor, but rather decrease the latter.
If I remember right, than the meminc_factor by how much to increase a 
memory estimate when the previous one was too small. If you increase too 
fast, you may run out of memory early.

Stefan


On 02/11/2013 11:39 PM, Knut Heidemann wrote:
> Hi,
>
> I am trying to solve problems with about 6e5 dofs and 1e5 equality
> constraints with a pretty dense hessian.
> I am getting an "Insufficient_Memory" exit from the MA27 solver.
> I guess that I have to adjust "ma27_liw_init_factor", and/or
> "ma27_la_init_factor", and/or "ma27_meminc_factor".
> Unfortunately, just increasing these parameters to some higher values
> did not help.
> Could you tell me the usual procedure, how to circumvent this problem?
> Just setting to +inf is probably not the way to go?
>
> Best,
> --Knut Heidemann.
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