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[Help-glpk] Sizing the problem...

From: Michael Bramley
Subject: [Help-glpk] Sizing the problem...
Date: Sun, 3 Feb 2013 10:48:21 -0500



We are using Linux glpk v4.48.


This may be a school boy question, but I’ll ask and beg indulgence from those on the list.


We have a number of LP/MIP problems that range in size.  Most are quite manageable in glpk (yeah!!), while a small subset of others test the limits of glpk to either find a solution or run for days without a solution.  Indeed, the annoying bit is that some problems just seem to run for days and days, while CPLEX seems to find an answer in minutes.


Is there a way to determine this limit in advance, i.e. can we look at the problem and say that generates X conditions (or something else) and thus is not suited for glpk in its current state?


Is there a way that we could build this into glpk as a pre-processing option?


Looking for any ideas/help, and may even respond to invective. :)




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