Save too large excel file to django model

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Excuse me,Do too large xlsx file possible effect save "save_book_to_database" function?
I try to upload a 6.8M xlsx file to save_book_to_database but my table is empty.

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This is my code.

    request.FILE['docfile'].save_book_to_database(
        models=[NewModel],
        initializers=[None],
        mapdicts=[convertcol,convertcol]
        )

convertcol is a list,correspond xlsx column header.
Sheet name file name,and model name are same.

[chfw]

Quickly, if mapdicts should be a list, its member should be string names or column names that match your model columns

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Oh,model columns and mapdicts are same,but I find out my problem.
Maybe .xlsx file have any problem so save_book_to_database fail.
Thank you for your reply.