how to set the memory parameter in a Gurobi model using c++?

Answered

Igor Melo

May 11, 2023 16:42 Edited

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I'm trying to set a memory limit to my Gurobi Model.

GRBEnv env = GRBEnv(true);
env.set("LogFile", "Model_DEBUG.log");
env.start();
GRBModel model = GRBModel(env);
model.getEnv().set(GRB_DoubleParam_MemLimit, 8);

But, this doesn't work. How could I set this parameter?

I'm trying to set 8Gb of ram to my gurobi model, considering the c++ language

Related to

• C++
• Memory
• Parameters

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 13, 2026 01:43

  This post is more than two years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum, or try Gurobot, our chatbot interface offering instant, expert-level support.
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  Elisabeth Rodríguez Heck

  • Gurobi Staff

  May 12, 2023 10:40

  Hi Igor,

  Which Gurobi version are you using? In version 9.5 the MemLimit parameter had to be set before starting the environment. If you are using 9.5, your code should be replaced by

  GRBEnv env = GRBEnv(true);
  env.set("LogFile", "Model_DEBUG.log");
  env.set("MemLimit", 8);
  env.start();
  GRBModel model = GRBModel(env);

  But starting from version 10.0 your original snippet should work.

  Elisabeth

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  Igor Melo

  May 12, 2023 15:44

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  Thank you very much, I'll try this way

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