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QDataStream memory overflow [solved]

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  • SGaistS Offline
    SGaistS Offline
    SGaist
    Lifetime Qt Champion
    wrote on last edited by
    #3

    Hi,

    Pretty strange… You could try flushing the QDataStream in between two _missionsEx.

    Also, are you sure that everything is generated correctly ?

    Interested in AI ? www.idiap.ch
    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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    • F Offline
      F Offline
      Francknos
      wrote on last edited by
      #4

      Everything is generated correctly i'm sure because I work with this data.
      I'd like try a "flush" between missions but there is no function flush or something like that in QDataStream.

      thk for your reply.

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      • SGaistS Offline
        SGaistS Offline
        SGaist
        Lifetime Qt Champion
        wrote on last edited by
        #5

        Sorry, it's in QTextStream.

        One thing you could do is check the status of the stream between two writes

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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        • F Offline
          F Offline
          Francknos
          wrote on last edited by
          #6

          The status is everytime ok.
          All "missions" are done in the loop but I think the size of data is to big.
          about 1,6 Go in RAM.
          There is no error in writing, it's when I want import these data that the reader write first data (about 50 -55 missions).

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          • SGaistS Offline
            SGaistS Offline
            SGaist
            Lifetime Qt Champion
            wrote on last edited by
            #7

            32bit application ?

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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            • F Offline
              F Offline
              Francknos
              wrote on last edited by
              #8

              Yes I would like to do in 64 but i used a library in 32.

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              • SGaistS Offline
                SGaistS Offline
                SGaist
                Lifetime Qt Champion
                wrote on last edited by
                #9

                I wonder if you're not hitting the 2GB memory limit somehow, but that should rather kill your application AFAIK.

                Interested in AI ? www.idiap.ch
                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                • G Offline
                  G Offline
                  giesbert
                  wrote on last edited by
                  #10

                  But writing or reading files with more then 2 GB should not hurt unless you allocate everything in memory, shouldn't it?

                  Nokia Certified Qt Specialist.
                  Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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                  • SGaistS Offline
                    SGaistS Offline
                    SGaist
                    Lifetime Qt Champion
                    wrote on last edited by
                    #11

                    AFAIK, it should not.

                    However I wonder what might happen if you are reaching the limit of available memory without allocating enough to make the OS decide to kill your application.

                    Interested in AI ? www.idiap.ch
                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                    • G Offline
                      G Offline
                      giesbert
                      wrote on last edited by
                      #12

                      What about: try it out? :D

                      Nokia Certified Qt Specialist.
                      Programming Is Like Sex: One mistake and you have to support it for the rest of your life. (Michael Sinz)

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                      • F Offline
                        F Offline
                        Francknos
                        wrote on last edited by
                        #13

                        Hi Thanks for your reply,

                        For information, I think the OS block the use of memory at about 2Go.
                        I have a lot of memory (64Go). But my application use 1.6Go at maximum.

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                        • SGaistS Offline
                          SGaistS Offline
                          SGaist
                          Lifetime Qt Champion
                          wrote on last edited by
                          #14

                          It's because your application is 32bit, the max memory size it can use is 2GB even if you computer had terabytes available

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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