#12903: Memory leaks with CPLEX
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Reporter: ncohen | Owner: ncohen
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.1
Component: linear programming | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers:
Authors: | Merged in:
Dependencies: | Stopgaps:
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Changes (by ncohen):
* status: needs_work => needs_review
Comment:
Hellooooooo !!
Well, it actually isn't related to try/catch (your LP computes a vertex
cover --> it never fails) but there is a leak indeed `:-D`
I reduced your code to that and the problem remains
{{{
for i in xrange(5000):
p = MixedIntegerLinearProgram(solver = "CPLEX", maximization = False)
b = p.new_variable(dim=1)
for u,v in [(0, 1), (0, 4), (0, 5), (1, 2), (1, 6), (2, 3), (2, 7),
(3, 4), (3, 8), (4, 9), (5, 7), (5, 8), (6, 8), (6, 9), (7, 9)]:
p.add_constraint(b[u]+b[v] >= 1)
print get_memory_usage()
}}}
That is fixed by some additional sage_free calls.... All the method had
them except two, add_linear_constraint included. `-_-`
By the way, I am a bit scared... Do the tests pass for you when having
CPLEX installed as the default solver ? I see a broken docstring in
generic_graph in the traveling_salesman_problem method. The bug is not
realted to this ticket (it appears regardless of whether the current patch
is applied) and I have no idea where it comes from `O_o`
Nathann
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12903#comment:3>
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