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As you can see when the batch size is 40 the Memory-Usage of GPU is about 9.0GB, when I increase the batch size to 50, the Memory-Usage of GPU decrease to 7.7GB. And I continued to increase the batch size to 60, and it increase to 9.2GB. Why the Memory-Usage of GPU was so high.According to the common sense, it should be lower than 7.7GB.