Tuning and Time Limits

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The overall time limit for the tuning process is set with the general time limit parameter (TiLim, CPX_PARAM_TILIM) .

Tuning consists of a series of optimizations of each of the problems to be tuned. The time limit on each of these optimizations is specified by the tuning time limit parameter (TuningTiLim, CPX_PARAM_TUNINGTILIM). The default value of this parameter is set to a value much smaller than the default value of the overall time limit, so as to avoid runs of indeterminate length.

The per-problem, per-optimization time limit can also be set using the general time limit parameter (TiLim, CPX_PARAM_TILIM) in a fixed parameter set. Fixing Parameters and Tuning Multiple Models in the Interactive Optimizer explains more about that approach. You would want to set the per-problem, per-optimization time limit in this way if you are using a time limit in your usual (non-tuning) runs of the models.