The barrier solver terminates when the relative difference between the
primal and dual objective values is less than the specified tolerance
GRB_OPTIMAL status). Tightening this tolerance often
produces a more accurate solution, which can sometimes reduce the time
spent in crossover. Loosening it causes the barrier algorithm to
terminate with a less accurate solution, which can be useful when
barrier is making very slow progress in later iterations.
Note: Barrier only
For examples of how to query or modify parameter values from our different APIs, refer to our Parameter Examples.