A ResourceExhaustedError: out of memory (OOM) when allocating tensor is an error that occurs

when the GPU runs out of memory while trying to allocate memory for a tensor. A tensor is a multi-

dimensional array of numbers that represents the data or the parameters of a machine learning

model. The size and shape of a tensor depend on various factors, such as the input data, the model

architecture, the batch size, and the optimization algorithm1.

For the use case of training a computer vision model that predicts the type of government ID present

in a given image using a GPU-powered virtual machine on Compute Engine, the best option to

resolve the error is to reduce the batch size. The batch size is a parameter that determines how many

input examples are processed at a time by the model. A larger batch size can improve the model’s

accuracy and stability, but it also requires more memory and computation. A smaller batch size can

reduce the memory and computation requirements, but it may also affect the model’s performance

and convergence2.

By reducing the batch size, the GPU can allocate less memory for each tensor, and avoid running out

of memory. Reducing the batch size can also speed up the training process, as the GPU can process

more batches in parallel. However, reducing the batch size too much may also have some drawbacks,

such as increasing the noise and variance of the gradient updates, and slowing down the

convergence of the model. Therefore, the optimal batch size should be chosen based on the trade-off

between memory, computation, and performance3.

The other options are not as effective as option B, because they are not directly related to the

memory allocation of the GPU. Option A, changing the optimizer, may affect the speed and quality of

the optimization process, but it may not reduce the memory usage of the model. Option C, changing

the learning rate, may affect the convergence and stability of the model, but it may not reduce the

memory usage of the model. Option D, reducing the image shape, may reduce the size of the input

tensor, but it may also reduce the quality and resolution of the image, and affect the model’s

accuracy. Therefore, option B, reducing the batch size, is the best answer for this question.

Reference:

ResourceExhaustedError: OOM when allocating tensor with shape - Stack Overflow

How does batch size affect model performance and training time? - Stack Overflow

How to choose an optimal batch size for training a neural network? - Stack Overflow