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Out of memory using ETM

MaxUnicam
MaxUnicam
in ProM 6
I am using the "Mine a Process Tree with ETMd" plugin with a specific event log, but after few minutes of execution an out of memory exception is generated. There are some settings that can help to mitigate this problem? Or there are some known issues? 

Answers

  • hverbeek
    hverbeek
    Hi,

    Yes, in the ProM Package Manager you can set the amount of memory that the Java VM may use when running ProM. At the bottom, the ProM Package Manager displays a panel like follows:

    Depending on how much memory your computer actually has, some buttons may be added or removed. Here, you can select the amount of memory.

    You can also do this manually by changing the value for the "-Xmx" option in the .bat, .sh., or .l4j.ini file, but using the ProM Pakcage Manager is usually more convenient.

    Kind regards,
    Eric.
  • JBuijs
    JBuijs
    If the problem persists after increasing the memory, try reducing the number of generations of the ETMd, or else the population size. You can also try the ETMd Pareto Live version, which will always have the most recent result in case of an error (if I recall correctly).
    Joos Buijs

    Senior Data Scientist and process mining expert at APG (Dutch pension fund executor).
    Previously Assistant Professor in Process Mining at Eindhoven University of Technology
  • MaxUnicam
    MaxUnicam
    edited May 2019
    In any case, thanks to both!
  • MaxUnicam
    MaxUnicam
    Ok, I increased the memory limit but this did not solve the problem. After that I setted the population size to 5 and the number of generation to 100 (are these values too small for the goodness of the results?): the plugin does not generate out of memory exception any more but after more than an hour of execution does not end.
  • JBuijs
    JBuijs
    population of 5 is rather small, I would recommend 10 as the lowest setting, and 2-4 as the 'elite size' minimum.

    If 100 generations take a long time your event log is rather big (mainly in number of activities) so you might try filtering. The ETM is multi-threaded so will make use of multiple CPU cores if possible, if you have another computer with a more powerful CPU this will help.
    Joos Buijs

    Senior Data Scientist and process mining expert at APG (Dutch pension fund executor).
    Previously Assistant Professor in Process Mining at Eindhoven University of Technology
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