Performance issue: lp solve CPLEX vs Clp

[svigerske]

Issue created by migration from Trac.

Original creator: anh509

Original creation time: 2014-06-20 05:33:28

Assignee: @tkralphs

Version: trunk (SVN)

The attached problem is solved in a few seconds with Clp as the LP solver. The option file contains

do_primal_heuristic 0
prep_level 0

and the build options are
../configure --enable-debug --enable-sensitivity-analysis --enable-tests

When CPLEX is used, however, the variable branched on in the root node changes and we solve many more LPs in the root node and further iterations. We end up solving more nodes too. The violated cuts found are different with or without cgl cuts. SYM with CPLEX is built with

./configure --enable-debug --enable-sensitivity-analysis --with-cplex-lib=-L/usr/local/CPLEX_Studio_125/cplex/lib/x86-64_sles10_4.1/static_pic/ -lcplex -lpthread -lm --with-cplex-incdir=/usr/local/CPLEX_Studio_125/cplex/include/ilcplex --with-lp-solver=cplex

[svigerske]

Attachment masterDesc_6.MPS by anh509 created at 2014-06-20 05:33:56