Re: [Help-glpk] [Fwd: Low performance when solve MIP problem with glp intopt in GLPK]

[Robbie Morrison]

Hello John

First up, you need to join the [help-glpk] list if you
wish to engage further:

  http://www.gnu.org/software/glpk/#lists

Some thoughts on slow models are covered here:

  http://en.wikibooks.org/wiki/GLPK/Troubleshooting#Slow_models

You didn't say whether you were using GLPSOL
or the GLPK library.  I take it is the former.

HTH, Robbie

------------------------------------------------------------
To:           address@hidden
Subject:      Low performance when solve MIP problem with glp intopt in GLPK
From:         John <address@hidden>
Date:         Thu, 27 Jun 2013 13:36:30 +0800 (CST)
------------------------------------------------------------

> Hello,
>
> It runs over 2hours when solve a MIP problem
> with 4 rows and 4000 columns. I think it should
> be completed in several minutes.  Could you help
> me to find out the problem or give some
> suggestions on how to improve the performance?
>
> GLPK Version: 4.51
> Hardware and Software Information:
> Processor: Intel(R) Xeon(R) CPU E7-4850 @ 2.00GHz 2.00 GHz (4
> processors)
> RAM: 8.00GB
> System Type: 64bit Operation System
> OS: Windows Server 2008 R2 Standard(Service Pack 1)
> Performance Information when running:
> CPU Usage: 25%
> Memory Usage:150,900K
> Page Faults:75,000
>
> Regards,
> John

---
Robbie Morrison
PhD student -- policy-oriented energy system simulation
Technical University of Berlin (TU-Berlin), Germany
University email (redirected) : address@hidden
Webmail (preferred)           : address@hidden
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