- I am training a model, and using the original learning rate of the author (I use their github too), I get a validation loss that keeps oscillating a lot, it will decrease but then suddenly jump to a large value and then decrease again, but never really converges as the lowest it gets is 2 (while training loss converges to 0.0 something - much below 1)
At each epoch I get the training accuracy and at the end, the validation accuracy. Validation accuracy is always greater than the training accuracy.
When I test on real test data, I get good results, but I wonder if my model is overfitting. I expect a good model's val loss to converge in a similar fashion with training loss, but this doesn't happen and the fact that the val loss oscillates to very large values at times worries me.
- Adjusting the learning rate and scheduler etc etc, I got the val loss and training loss to a downward fashion with less oscilliation, but this time my test accuracy remains low (as well as training and validation accuracies)
I did try a couple of optimizers (adam, sgd, adagrad) with step scheduler and also the pleateu one of pytorch, I played with step sizes etc. but it didn't really help, neither did clipping gradients.
Is my model overfitting? If so, how can I reduce the overfitting besides data augmentation? If not (I read some people on quora said it is nothing to worry about, though I would think it must be overfitting), how can I justify it? Even if I would get similar results for a k-fold experiment, would it be good enough? I don't feel it would justify the oscilliating. How should I proceed?