GAMS — The Solver Manuals - Available Software

CPLEX 11 203
3 Network optimizer followed by dual simplex
4 Barrier with crossover
5 Sifting
submipnodelim (integer)
Controls the number of nodes explored in an RINS subMIP. See option rinsheur.
(default = 500)
symmetry (integer)
Determines whether symmetry breaking cuts may be added, during the preprocessing phase, to a MIP
model.
(default = -1)
-1 Automatic
0 Turn off symmetry breaking
1 Moderate level of symmetry breaking
2 Aggressive level of symmetry breaking
3 Very aggressive level of symmetry breaking
4 Highly aggressive level of symmetry breaking
5 Extremely aggressive level of symmetry breaking
threads (integer)
Default number of parallel threads allowed for any solution method.
(default = 1)
tilim (real)
The time limit setting determines the amount of time in seconds that Cplex will continue to solve a problem.
This Cplex option overrides the GAMS ResLim option. Any non-negative value is valid.
(default = GAMS ResLim)
trelim (real)
Sets an absolute upper limit on the size (in megabytes) of the branch and cut tree. If this limit is exceeded,
Cplex terminates optimization.
(default = 1e+075)
tuning (string)
Invokes the Cplex parameter tuning tool. The mandatory value following the keyword specifies a GAMS/Cplex
option file. All options found in this option file will be used but not modified during the tuning. A sequence
of file names specifying existing problem files may follow the option file name. The files can be
in LP, MPS or SAV format. Cplex will tune the parameters either for the problem provided by GAMS
(no additional problem files specified) or for the suite of problems listed after the GAMS/Cplex option file
name without considering the problem provided by GAMS (use option writesav to create a SAV file of the
problem provided by GAMS and include this name in the list of problems). The result of such a run is the
updated GAMS/Cplex option file with a tuned set of parameters. The solver and model status returned to
GAMS will be NORMAL COMPLETION and NO SOLUTION. Tuning is incompatible with the BCH facility and
other advanced features of GAMS/Cplex.
tuningdisplay (integer)
Specifies the level of information reported by the tuning tool as it works.
(default = 1)
0 Turn off display