Update app.py

app.py

@@ -118,8 +118,8 @@ trainer = SFTTrainer(
     dataset_num_proc=2,
     packing=False,
     args=TrainingArguments(
-        per_device_train_batch_size=20,
-        gradient_accumulation_steps=20,
+        per_device_train_batch_size=18,
+        gradient_accumulation_steps=18,
         learning_rate=2e-4,
         fp16=not is_bfloat16_supported(),
         bf16=is_bfloat16_supported(),