Need clarification on behavior of total_limit_size and overflow_action parameters

I was reading through the [Config: Buffer Section](https://docs.fluentd.org/configuration/buffer-section) page and I needed to clarify the behavrior of two parameters.

**overflow_action** - How output plugin behaves when its buffer queue is full

**total_limit_size** - The size limitation of this buffer plugin instance. Once the total size of stored buffer reached this threshold, all append operations will fail with error (and data will be lost)

If I set overflow action to block, will append operations fail if total_limit_size is reached?

When I looked through the code I noticed it throws a BufferOverflowError if the stage and queue size exceeds the configured total_limit_size

Does the overflow_action only apply to the queue (and not stage)?