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gemma-2-2b

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When doing Peft finetuning, I always get OOM error at the time when the model gets saved.

There is enough memory for sure, 48GB card, uses less than 20GB and then a huge spike at the time of saving the model. This does not happen with Gemma-2 9B model.

I train 9B model with the same data, and there is no problem at all.

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OutOfMemoryError: CUDA out of memory. Tried to allocate 15.26 GiB. GPU 0 has a total capacty of 47.40 GiB of which 11.35 GiB is free. Process 2397559 has 35.67 GiB memory in use. Of the allocated memory 34.28 GiB is allocated by PyTorch, and 903.30 MiB is reserved by PyTorch but unallocated. If reserved but unallocated memory is large try setting max_split_size_mb to avoid fragmentation. See documentation for Memory Management and PYTORCH_CUDA_ALLOC_CONF
###################################

trainer = transformers.Trainer(
model=model,
train_dataset=tokenized_train_dataset,
eval_dataset=tokenized_val_dataset,
args=transformers.TrainingArguments(
output_dir=output_dir,
warmup_steps=2,
per_device_train_batch_size=batch_size,
gradient_accumulation_steps=gradient_accumulation_steps,
num_train_epochs=num_epochs,
#max_steps=10000,
learning_rate=2e-4,
bf16=True,
#optim="paged_adamw_8bit",
optim="paged_adamw_32bit",
logging_steps=5,
logging_dir="./logs",
save_strategy="steps",
save_steps=5,
evaluation_strategy="steps",
eval_steps=5,
do_eval=True,
#use_flash_attn: True,
),
data_collator=transformers.DataCollatorForLanguageModeling(tokenizer, mlm=False),
)