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Cplex out of memory
#1
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Hi, 

I am running a large model and receive the attached errors.
   
It seems it is related to the number thread. But in the CPlex setting, I could not increase that 

   

Any help ?
I have a machine with 16 gb ram.
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#2
See:  https://support.gams.com/solver:error_1001_out_of_memory

I suspect there may be something unusual about your model, because I think your size should fit well in 16 Gb.

I'd say the first things to try would be using names no and maybe barorder 3 in cplex.opt.  If that does not help, you can also try using memoryemphasis 1, but that may slow down the solution considerably. As far as I can tell, the more threads are used, the more memory is needed, and so increasing the number of threads should not help.

Also, just in case: make sure you are using 64-bit GAMS/Cplex.
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#3
(24-08-2020, 08:29 PM)Antti-L Wrote: See:  https://support.gams.com/solver:error_1001_out_of_memory

I suspect there may be something unusual about your model, because I think your size should fit well in 16 Gb.

I'd say the first things to try would be using names no and maybe barorder 3 in cplex.opt.  If that does not help, you can also try using memoryemphasis 1, but that may slow down the solution considerably. As far as I can tell, the more threads are used, the more memory is needed, and so increasing the number of threads should not help.

Also, just in case: make sure you are using 64-bit GAMS/Cplex.


Thanks, 
The solution in the above link helped and resolved the problem.
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