[erlang-questions] high_watermark and high_msgq_watermark: how to use them?

[Max Lapshin]

Hi.
There are two new options:  high_watermark and high_msgq_watermark

I want client to block at 4 Mb of unfetched data and unblock when his queue
is empty.
Is it enough just to use high_watermark and low_watermark?

Is it possible that I set 4 Mb of high_watermark, but sender is blocked due
to msgq overfill?
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