THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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The StreamingJobGraphGenerator sets tasks of different pipelined regions into different slot sharing groups. In this way, when the StreamingJobGraphGenerator sets relative managed memory quota for operators, it will calculate the fractions only considering operators that might run at the same time. This improves resource utility utilisation for bounded batch jobs where usually not all tasks run concurrently.
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