# CNN accuracy and loss doesn't change over epochs for sentiment analysis

I am performing text classification as Good [1] or Bad [0]. The texts are preprocessed and converted to Vectors using Google Word2Vec. Further CNN architecture is used for training. I have roughly 13000 texts as Bad[0] and 5450 texts as Good[1] for training (making it a roughly 70:30%) The issue starts when I realize I don't have enough compute power (2GB GPU). Hence I compromise and use 100 dimensions of word embeddings from Word2Vec (instead of the 300). After certain hyperparameter tuning in the CNN architecture, I am able to obtain a 30-35% precision, which I am happy with. After months, I have an 8GB GPU in the server and I implemented the 300-dimensional word embeddings in Word2Vec and kept for training. Ideally, I should have obtained better results; instead, the loss and accuracy don't change with time for every epoch. Thus it predicts all texts as Bad[0]. Can you please help me identify the problem and If I am missing out anything here!

EDIT:

I would like to add some clarifications: In the Linux server with GPU 1070Ti 8GB, I tried with three experiments in this order: a) 300-dimensional word embeddings b) 100-dimensional word-embeddings and c) 105-dimensional word embeddings I have obtained no change in accuracy and loss for a) and c). However, for b), it is exactly the same results as I obtained with my local GPU(750Ti Nvidia 2GB). In short, its working fine for 100-dimensional in the server.

Now, since I can't assign 300d word vectors in my local GPU, I make up the same experiment as c) with 105d vectors in the local GPU to just check if there's any fault in code, and surprisingly it's giving around 30% precision much similar to earlier results.

I am having a hard time figuring out the issue in the server GPU as its working fine for 100d word vectors but fail to give proper predictions for other dimensional word-embeddings.

I am attaching some results which might make it a lot clear:

1.) Trained with 100d vectors in local(2GB) GPU precision recall f1-score support

    0.0       0.70      0.83      0.76      1973
1.0       **0.31**      0.17      0.22       850


avg / total 0.58 0.63 0.60 2823

2.) Trained with 100d vectors in server (8GB) GPU precision recall f1-score support

    0.0       0.70      0.77      0.73      1973
1.0       **0.30**      0.23      0.26       850


avg / total 0.58 0.61 0.59 2823

3.) This is the same result for both 105d and 300d vectors trained in server GPU precision recall f1-score support

    0.0       0.70      1.00      0.82      1973
1.0       **0.00**      0.00      0.00       850


avg / total 0.49 0.70 0.58 2823

4.) Trained with 105d vectors in local(2GB) GPU precision recall f1-score support

    0.0       0.70      0.83      0.76      1973
1.0       **0.30**      0.18      0.23       850


avg / total 0.57 0.64 0.61 2823