how to reduce the factor NZ efficiently?

回答済み

Yanda Jiang

2024年11月07日 06:47

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Dear all,

I’ve encountered an issue while using barrier method in Gurobi to solve my LP problem: the factor NZ is very large, even larger than my server's memory capacity. Do you have any suggestions on how to reduce it? Could adjusting the order of constraints be effective, or is the solver’s reordering process already optimizing this? Any advice would be much appreciated.

 

 

Best regards,

Yanda

関連

• Barrier

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  Maliheh Aramon

  • Gurobi Staff

  2024年11月08日 00:23

  Hi Yanda, 

  Thank you for contacting us.

  You can check the "Performance Tuning for Gurobi's Barrier Algorithm" presentation to learn about different strategies to improve barrier performance. 

  Parameters such as PreDual, BarOrder, and the one explained on slide 38 of the presentation above are worth experimenting with. 

  Best regards,

  Maliheh

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  Yanda Jiang

  2024年11月11日 22:27

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  Thanks, Maliheh.

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