Specifying custom solver options¶

Gurobi¶

Refer to the Gurobi manual, which contains a list of parameters. Simply use the names given in the documentation (e.g. "NumericFocus" to set the numerical focus value). For example:

config.solve:
    solver: gurobi
    solver_options:
        Threads: 3
        NumericFocus: 2

CPLEX¶

Refer to the CPLEX parameter list. Use the "Interactive" parameter names, replacing any spaces with underscores (e.g., the memory reduction switch is called "emphasis memory", and thus becomes "emphasis_memory"). For example:

config.solve:
    solver: cplex
    solver_options:
        mipgap: 0.01
        mip_polishafter_absmipgap: 0.1
        emphasis_mip: 1
        mip_cuts: 2
        mip_cuts_cliques: 3