Originally posted by: Xiaopihai

Hi folks,

I'm trying to let cplex only use one thread using python API.

Here's the code 

                cplex_model = cplex.Cplex("file.lp")
                cplex_model.parameters.threads = 1
                cplex_model.solve()

But it seems that cplex is still using all the 24 threads that I have on my server when I check the process using htop.

Does anyone know if i'm doing it correctly?

Thanks!

To set the threads parameter you must use the following syntax:

cplex_model.parameters.threads.set(1)

To verify that it is working correctly, the engine log should contain lines like the following:

CPXPARAM_Threads                                 1
...
Parallel mode: none, using 1 thread.
...