PrePasses setting doesn't seem to have an effect?

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  • Matthias Miltenberger

    Hi Sebastian,

    The parameter PrePasses actually limits the maximum number of passes through all the different presolving routines. It can still happen that there is a specific presolving routine that takes a lot of time.

    Gurobi tries to print a new line every 5 seconds - this does not relate to the actual passes through the presolving phase.

    Usually, the time invested in presolving pays off in a much faster-to-solve problem for the often more time-consuming branch-and-cut process.

    Did you try disabling Presolving altogether (Presolve=0) to see how the overall performance is affected?

    Cheers,
    Matthias

     

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