Originally posted by: savant_ning

I  run my model, and get this display, and about 10hours, the display not changed.

and I use

c.parameters.read.datacheck.values.off

and

c.parameters.read.datacheck.values[0].

but it's no use for my model, I also got the display the CPXPARAM_Read_DataCheck   1

my model is a MIP, and  73696 variables and about 40GB constraints

so what should I solve this problem~

A few things:

• Your output of top shows that two processes are running at 100% CPU load. It may help to not run other CPU intensive processes while trying to solve a model with CPLEX.
• Can you check whether the code has already started executing the solve() function (just print something before calling solve())?
• Can you export the model to a SAV file and see if things go any faster with the interactive optimizer?
• How exactly did you try to disable data checking? From your post it is not clear whether you did things correctly or not.

Originally posted by: savant_ning

thx,

the second  thing: I print (problem.feasopt(problem.feasopt.all_constraint()))  before calling solve(),

 and I used 1/problem.set_result_stream(sys.stdout); 2/problem.set_log_stream(sys.stdout) and  3/call back the Timelimitcallback(MIPinfocallback) to set the timelimit = 10800  before calling solve()

the forth thing: I used problem.parameters.read.datacheck.values.off  and

problem.parameters.read.datacheck.values[0]

 before calling solve()

I don't know the usage is correct or not.

I will export the model to SAV, but I need to break the code...and I can export the model next run, when I fix other possible question like the second thing, the forth thing

very thanks
 

Originally posted by: savant_ning

about the first thing, I used cplex at our server, it's a 56- kernel server, so I think other processes will not affect the cplex solve my model.

thanks

Originally posted by: savant_ning

before calling the solve()

I just used this function, see the attachment..

So, I don't know how to reduce the run time...

should I need export the model.SAV to check it?

This statement

problem.parameters.read.datacheck.values.off

just does nothing. Like I said in the other thread you started, the correct way to set the parameter is this

problem.parameters.read.datacheck.set(problem.parameters.read.datacheck.values.off)

It seems you are setting all the other parameters correctly (in the commented code), so why do things differently for this parameter?

As for the running time, I think you got my question wrong. I was wondering whether all this time was burnt before even calling solve(). If you can export a SAV file then I suggest to try solving this SAV file with the interactive and see what is happening. Or attach the SAV file here and we can take a look.