Originally posted by: SystemAdmin

[Sylvain said:]

I would like to use IloSolution objects in my program and I need to delete them.
But the method IloSolution::end() does not seem to work as I expected.
The following code prints out
24048
28056
36072
36072
36072
36072
on my computer.
I would expect the memory usage to decrease after deleting the IloSolution and re-increase after recreating the object but it doesn't. Any explanations ?

IloEnv env;
IloIntVarArray X(env, 100, 1, 100);
IloSolution sol;
for(IloInt i = 0; i < 2; i++) {<br /> env.out() << env.getTotalMemoryUsage() << endl;<br /> sol = IloSolution(env);
env.out() << env.getTotalMemoryUsage() << endl;<br /> sol.add(X);
env.out() << env.getTotalMemoryUsage() << endl;<br /> sol.end();
}


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Originally posted by: SystemAdmin

[shaw said:]

It could be an issue about how small blocks are counted within Concert.
Your code does not appear to leak, so everything appears to be fine.
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Originally posted by: SystemAdmin

[Sylvain said:]

I have another code that might help understanding the problem I am facing:

IloEnv env;
IloSolution sol;
IloIntVarArray X;
for(IloInt i = 0; i < 4; i++) {<br /> env.out() << env.getTotalMemoryUsage() << endl;<br /> X = IloIntVarArray(env, 100, 1, 100);
env.out() << env.getTotalMemoryUsage() << endl;<br /> sol = IloSolution(env);
env.out() << env.getTotalMemoryUsage() << endl;<br /> sol.add(X);
env.out() << env.getTotalMemoryUsage() << endl;<br /> sol.end();
env.out() << env.getTotalMemoryUsage() << endl;<br /> X.end();
}

This code returns:

16032
24048
28056
36072
36072
36072
40080
40080
40080
40080
40080
48096
48096
48096
48096
48096
52104
52104
52104
52104

The memory keeps increasing I guess because of the creation of new variables even though I am deleting them at the end of the loop.
I am using Ilog Concert 2.3.
#CPOptimizer
#DecisionOptimization

Originally posted by: SystemAdmin

[shaw said:]

Hello Sylvain,

To get rid of all the variables, you need to do:

  for (IloInt j = 0; j < X.getSize(); j++)<br />    X[j].end();
  X.end();

I think that should demonstrate that there no leaks.


Paul
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Originally posted by: SystemAdmin

[alain.chabrier said:]

X.endElements() is a short cut to end all the elements.

Alain
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#DecisionOptimization

Originally posted by: SystemAdmin

[Sylvain said:]

Sorry, I forgot that again.

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#DecisionOptimization