When exporting trace information:

1. What's the high/low watermark for heap usage, if any?
2. If the heap usage hits a certain threshold, does the exporter become blocking at that point?
3. Is there a way to configure high watermarks for the client?

We were able to verify heap usage increased steadily as we added backpressure to our ingest service. This can become a big issue if we had actual latency issues or if our ingest service was down.