Originally posted by: HadiUON

Hi,

I have some questions. I set Cplex relative gap to zero, i.e:

cplex.setParam(IloCplex::EpGap, 0);

Now I want to know:

1- What is the value of relative gap in this case? In other words, I want to know what is the minimum possible value for this parameter? Does it depend on the machine which I use?

2-Does it effect any features of Cplex like variable selection strategy or heuristic frequency and etc?

Thanks

You can query the minimal allowed value for a parameter using IloCplex::getMin(parameter). For parameter IloCplex::EpGap the minimal value is 0. That minimal value does not depend on the machine. A definition of the relative gap can be found here. Maybe the reference documentation of that parameter can help you understand better what this parameter does?

The setting of parameter IloCplex::EpGap does not affect any of the features you listed.

Originally posted by: HadiUON