Lower memory usage for MILP problem (SCHEDULING)

Ongoing

Burcu Genc

• October 30, 2023 10:29

Hello dear solvers,

I have 200 lines as input for a scheduling MILP problem I'm working on. When I run the data by dividing it on my computer, 20, 50 and 100 pieces work.They worked. However, when there are 200 items, I get an out of memory error. I'm adding his photo below. How can I run it? I request your help.

(note: for ''Döngü  2.5 2023-10-30 12:09:56 başladı'' I put a timer for the part and measure how long each loop runs.)

 

Related to

• MIP
• Memory
• Scheduling

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• 

  David Torres Sanchez

  Gurobi Staff

  • October 30, 2023 14:54

  Hi,

  If you can't get a larger machine, check out the suggestions here: How do I avoid an out-of-memory condition?

  Cheers, 
  David

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• 

  Burcu Genc

  • November 03, 2023 08:25

  

  

  

  Hello David,

   

  Thanks, but I tried lots of time of these suggestions. But it did not work, do you have any idea about my logic of model? Do i need to change the logic or how can i optimize my algorithm to solve quickly or with less memory?

  Trying to change Big M as small as possible will it work? or etc.

  Please give me a suggestion.

   

  Best Regards

  Burcu

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