How to reduce the total amount of training data

[xudh777]

I am debugging this project and would like to make some modifications based on it. So I tried to reduce the total number of training data, I reduced the length of the PKL dataset and only retained 1000 pieces of LiDAR data. I used newly generated PKL data for training, and the project did not report any errors, but the model did not converge

I suspect the reason for the error is that I reduced the total number of training data, causing some anomalies in data reading

I would like to ask which corresponding parameters should I change if I change the total amount of data？
May I ask where this 28130 comes from?

Sorry to bother you, I hope the experts I see can provide guidance