[Ipopt] memory usage grows each iteration

[Stefan Vigerske]

Hi,

no, that's not normal.
It's unlikely that this is a memory leak in Ipopt itself, so I would 
suggest to check with the cyipopt developers.

Stefan

On 2/12/19 10:23 AM, shirel josef wrote:
> hi,
> I am trying to solve a rather small optimization problem, using cyipopt
> python wrapper.
> As the the number of iterations goes up the memory usage is growing.
> At iteration 1 memory usage is at 200-400 MB
> At iteration 200 it goes up to about 6-7 GB
> 
> Is it common for memory usage to grow like this? When no more memory is
> available it starts using virtual and swap memory.
> 
> this is the inital output of ipopt
> 
> This is Ipopt version 3.12.11, running with linear solver ma27.
> 
> Number of nonzeros in equality constraint Jacobian...:     1792
> Number of nonzeros in inequality constraint Jacobian.:    14336
> Number of nonzeros in Lagrangian Hessian.............:        0
> 
> Total number of variables............................:       56
>                       variables with only lower bounds:        0
>                  variables with lower and upper bounds:        0
>                       variables with only upper bounds:        0
> Total number of equality constraints.................:       32
> Total number of inequality constraints...............:      256
>          inequality constraints with only lower bounds:      256
>     inequality constraints with lower and upper bounds:        0
>          inequality constraints with only upper bounds:        0
> 
> thank you
> 
> 
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