<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Dear Felipe, </div><div class=""><br class=""></div>Great! Thanks very much. The new version of SCIP.jl don’t have memory leak. <div class=""><br class=""></div><div class=""><br class=""></div><div class="">Regards,</div><div class="">Yankai</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Apr 20, 2017, at 9:56 PM, Felipe Serrano <<a href="mailto:fserranom5@gmail.com" class="">fserranom5@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Dear Yankai<div class=""><br class=""></div><div class="">We already investigated a possible memory leak. Please check</div><div class=""><a href="https://github.com/SCIP-Interfaces/SCIP.jl/issues/33" class="">https://github.com/SCIP-Interfaces/SCIP.jl/issues/33</a><br class=""></div><div class=""><br class=""></div><div class="">Please reopen the issue or create a new one there with this problem.<br class=""></div><div class=""><br class=""></div><div class="">Best,</div><div class="">Felipe</div></div><div class="gmail_extra"><br class=""><div class="gmail_quote">On Thu, Apr 20, 2017 at 11:22 PM, Yankai Cao <span dir="ltr" class=""><<a href="mailto:yankai.cao@gmail.com" target="_blank" class="">yankai.cao@gmail.com</a>></span> wrote:<br class=""><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word" class="">Hi, <div class=""><br class=""></div><div class=""><span style="background-color:rgb(255,255,255)" class=""><font color="#222222" face="Helvetica, Arial, sans-serif" class=""><span style="font-size:14px" class="">I am using </span></font></span>scipoptsuite-4.0.0 <span style="font-size:14px;color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;background-color:rgb(255,255,255)" class="">with julia interface SCIP.jl. I find that if I create and solve models in a for loop using SCIP with models built with JuMP, then the peak memory usage increases dramatically as the number of iterations increases. I would expect the peak memory usage keeps almost constant.</span></div><div class=""><span style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)" class=""><br class=""></span></div><div class=""><span style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)" class="">Here is the test code test.jl: </span></div><div class=""><span style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px" class=""><br class=""></span></div><div class=""><span style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px" class="">using JuMP, Gurobi, SCIP</span></div><div class=""><p style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px" class="">function test(iter)<br class="">for i = 1:iter<br class=""> m= Model()<br class=""> nvar = 1000<br class=""><span class="m_9183297217534967823mention"> @variable</span>(m, 0<=x[1:nvar]<=1)<br class=""><span class="m_9183297217534967823mention"> @constraint</span>(m, con[i in 1:(nvar-2)], x[i]+x[i+1]<=1)<br class=""><span class="m_9183297217534967823mention"> @objective</span>(m, :Min, sum{(x[i]+x[i+2])^2, i in 1:(nvar-2)})<br class=""> m.solver=SCIPSolver("display/<wbr class="">verblevel", 0)<br class=""><span class="m_9183297217534967823hashtag"> #m</span>.solver=GurobiSolver(<wbr class="">LogToConsole=0,OutputFlag=0)<br class=""> solve(m)<br class="">end<br class="">end<br class="">test(10)</p><div class=""><br class=""></div><div class="">I <span style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)" class="">monitored the peak memory usage using /usr/bin/time -v julia test.jl</span></div><div class=""><p style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px" class="">For SCIP, I got <br class="">test(1) <br class="">Maximum resident set size (kbytes): 234312<br class="">test(10)<br class="">Maximum resident set size (kbytes): 803168<br class="">test(100)<br class="">Maximum resident set size (kbytes): 6441800</p><p style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px" class="">For Gurobi, I got<br class="">test(1) <br class="">Maximum resident set size (kbytes): 174972<br class="">test(10)<br class="">Maximum resident set size (kbytes): 187388<br class="">test(100)<br class="">Maximum resident set size (kbytes): 263780</p><div class=""><span style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)" class="">So for Gurobi, the result is as expected, but for SCIP the peak memory usage do increases dramatically. Can anyone check this issue? Thanks.</span></div></div><div class=""><span style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)" class=""><br class=""></span></div><div class=""><span style="color:rgb(34,34,34);font-family:Helvetica,Arial,sans-serif;font-size:14px;background-color:rgb(255,255,255)" class=""><br class=""></span></div><div class=""><br class=""></div></div><div class=""><br class=""></div><div class=""><br class=""></div></div><br class="">______________________________<wbr class="">_________________<br class="">
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