Tensorflow上VGG16的内存问题

Question

我一直在尝试使用具有Tensorflow后端的VGG16 Keras模型来工作，以便对“行星：从 Kaggle的太空竞赛中了解亚马逊”进行图像分类。 不幸的是，当试图使模型运行时，即使在具有60 GB内存的AWS g.2.8大型AWS上运行时，我始终遇到内存问题。

问题的回溯如下：

    Layer (type)                 Output Shape              Param #
=================================================================
input_1 (InputLayer)         (None, 224, 224, 3)       0
_________________________________________________________________
block1_conv1 (Conv2D)        (None, 224, 224, 64)      1792
_________________________________________________________________
block1_conv2 (Conv2D)        (None, 224, 224, 64)      36928
_________________________________________________________________
block1_pool (MaxPooling2D)   (None, 112, 112, 64)      0
_________________________________________________________________
block2_conv1 (Conv2D)        (None, 112, 112, 128)     73856
_________________________________________________________________
block2_conv2 (Conv2D)        (None, 112, 112, 128)     147584
_________________________________________________________________
block2_pool (MaxPooling2D)   (None, 56, 56, 128)       0
_________________________________________________________________
block3_conv1 (Conv2D)        (None, 56, 56, 256)       295168
_________________________________________________________________
block3_conv2 (Conv2D)        (None, 56, 56, 256)       590080
_________________________________________________________________
block3_conv3 (Conv2D)        (None, 56, 56, 256)       590080
_________________________________________________________________
block3_pool (MaxPooling2D)   (None, 28, 28, 256)       0
_________________________________________________________________
block4_conv1 (Conv2D)        (None, 28, 28, 512)       1180160
_________________________________________________________________
block4_conv2 (Conv2D)        (None, 28, 28, 512)       2359808
_________________________________________________________________
block4_conv3 (Conv2D)        (None, 28, 28, 512)       2359808
_________________________________________________________________
block4_pool (MaxPooling2D)   (None, 14, 14, 512)       0
_________________________________________________________________
block5_conv1 (Conv2D)        (None, 14, 14, 512)       2359808
_________________________________________________________________
block5_conv2 (Conv2D)        (None, 14, 14, 512)       2359808
_________________________________________________________________
block5_conv3 (Conv2D)        (None, 14, 14, 512)       2359808
_________________________________________________________________
block5_pool (MaxPooling2D)   (None, 7, 7, 512)         0
_________________________________________________________________
sequential_1 (Sequential)    (None, 1)                 6423041
=================================================================
Total params: 21,137,729.0
Trainable params: 21,137,729.0
Non-trainable params: 0.0
_________________________________________________________________
Traceback (most recent call last):
  File "VGG16_Kg_Kernel.py", line 160, in <module>
        train_datagen.fit(x_train)
      File "/home/ec2-user/src/anaconda3/lib/python3.5/site-packages/keras/preprocessing/image.py", line 648, in fit
        x = np.copy(x)
      File "/home/ec2-user/src/anaconda3/lib/python3.5/site-packages/numpy/lib/function_base.py", line 1497, in copy
        return array(a, order=order, copy=True)
    MemoryError

完整的打印输出可以在这里找到： https : //github.com/jvk/VGG16/blob/master/error_text.txt

从打印结果来看，GPU似乎正在运行，但是可能运行不正常。

数据包含〜100K 11.6 KB图像。 我用来运行模型的代码可以在这里找到： https : //github.com/jvk/VGG16/blob/master/VGG16_Kg_Kernel.py

如果需要更多信息，请告诉我。谢谢！

Answer 1

简而言之，就是您的GPU内存不足，而不是RAM。 G2具有4GB图形处理器，并且VGG16和Tensorflow似乎存在问题。

我已经使用Theano后端运行了相同的程序，没有任何问题。 我建议尝试一下。