Lr Schedule

Pick the most likely cause when training loss drops for 1k steps, plateaus for 2k, then drops again at step 3k

Why ramp the learning rate during warmup instead of starting at the peak value?

Loss spikes the moment warmup ends: which hyperparameter is the prime suspect?

Pick the three first things to check when LoRA training loss sits flat from step 0

Fill in typical peak LRs for full FT, LoRA, and DPO