What kind of practical sense does it make to batch 400k objects? I can no imagine single usecase where one would be interested in walking through such an amount of objects manually. Better organize your data in a more
handy way or implement some search logic for bringing the batch size to a number of relevant object.s
Under our setup, beyond 300-400,000 contained objects, the batching provided by getBatchObjectListing becomes unusable. I've seen this problem mentioned somewhere but never any hint of a solution.