apeforest commented on issue #15703: Storage manager / memory usage regression in v1.5 URL: https://github.com/apache/incubator-mxnet/issues/15703#issuecomment-522780492 Root cause found: it is due to this line: https://github.com/apache/incubator-mxnet/blob/master/src/operator/tensor/ordering_op-inl.h#L434 mshadow::Shape is constructed using index_t, which by default is int32_t in MXNet 1.5. In this case, the workspace size is 3184736511 which exceeds 2^31 and hence causing integer overflow. Workaround: turn on the USE_INT64_TENSOR_SIZE compiler flag Possible Fix: 1) turn on USE_INT64_TENSOR_SIZE flag by default in 1.6 2) change the constructor of mshadow::Shape to use int64_t always. Lin
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