Slow solver execution

GAMS
1

Hi, GAMS world,
I have a problem in slow solver execution. I built a simple MILP model, but it need 98 second to execute the solver after I started the solving.

After the execution the model was solved quite fast (less than 2 seconds), and whatever solver I applied, it still took about 100 seconds to execute.
I tried another MINLP model I built before (the model is much bigger), and it only took a few seconds to execute.

Thanks,
Dylan

–
To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+unsubscribe@googlegroups.com.
To post to this group, send email to gamsworld@googlegroups.com.
Visit this group at http://groups.google.com/group/gamsworld.
For more options, visit https://groups.google.com/groups/opt_out.

2

Dylan,

Use ‘option profile=1;’ to find out which statements/equations in your GAMS code are executed slowly. The listing file contains the profile information.

Best,
Michael Bussieck - GAMSWorld Coordinator

On Saturday, November 16, 2013 9:33:07 AM UTC-5, Dylan Lan wrote:

Hi, GAMS world,
I have a problem in slow solver execution. I built a simple MILP model, but it need 98 second to execute the solver after I started the solving.

After the execution the model was solved quite fast (less than 2 seconds), and whatever solver I applied, it still took about 100 seconds to execute.
I tried another MINLP model I built before (the model is much bigger), and it only took a few seconds to execute.

Thanks,
Dylan

–
To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+unsubscribe@googlegroups.com.
To post to this group, send email to gamsworld@googlegroups.com.
Visit this group at http://groups.google.com/group/gamsworld.
For more options, visit https://groups.google.com/groups/opt_out.

3

Michael,

Thanks, the problem is solved.

Best regards,
Dylan

在 2013年11月18日星期一UTC+8下午3时30分05秒，Michael Bussieck写道：

Dylan,

Use ‘option profile=1;’ to find out which statements/equations in your GAMS code are executed slowly. The listing file contains the profile information.

Best,
Michael Bussieck - GAMSWorld Coordinator

On Saturday, November 16, 2013 9:33:07 AM UTC-5, Dylan Lan wrote:

Hi, GAMS world,
I have a problem in slow solver execution. I built a simple MILP model, but it need 98 second to execute the solver after I started the solving.

After the execution the model was solved quite fast (less than 2 seconds), and whatever solver I applied, it still took about 100 seconds to execute.
I tried another MINLP model I built before (the model is much bigger), and it only took a few seconds to execute.

Thanks,
Dylan

–
To unsubscribe from this group and stop receiving emails from it, send an email to gamsworld+unsubscribe@googlegroups.com.
To post to this group, send email to gamsworld@googlegroups.com.
Visit this group at http://groups.google.com/group/gamsworld.
For more options, visit https://groups.google.com/groups/opt_out.