Gurobi LP model (C++ library) killed on the run or out-of-memory exception thrown

Answered

Roberto Bargetto

• September 06, 2022 14:21

Hello,

Running an LP model coded with the C++ library, the process is killed on the run or the program throws an out-of-memory exception (more likely if the env 'GRB_DoubleParam_MemLimit' is set to a reasonable value, e.g., 8GB).

Model details
Optimize a model with 16000 rows, 64000000 columns and 128000000 nonzeros

The program is executed on a laptop with 16GB RAM and i-7 CPU running ubuntu 20.04 LTS OS.
Gurobi is used under a personal non-commercial academic license.
The same issue does not come up on Windows, but I need to run my program on ubuntu.

What's the problem?
Is it my code or Gurobi to work this way?

Many thanks in advance.

0

• 

  Maliheh Aramon

  Gurobi Staff

  • September 07, 2022 03:09

  Hi Roberto,

  If you are getting the out-of-memory exception with error code 10001, it means that Gurobi runs out of memory. You can try some of the ideas suggested in the article How do I avoid an out-of-memory condition? 

  Best regards,

  Maliheh

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• 

  Roberto Bargetto

  • September 13, 2022 07:37

  

  

  Hello Maliheh,

  Thank you for your response.

  All the options listed by G. Glockner have been tested or included in my code.
  My program goes out-of-memory solving such an LP model running the optimization or, if the model is very large, adding the variables to the model (call to method 'GRBModel::addVar(..)').

  Best regards,
  Roberto

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