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From Zach Cox <zcox...@gmail.com>
Subject Back Pressure details
Date Tue, 05 Apr 2016 20:47:36 GMT
Hi - I'm trying to identify bottlenecks in my Flink streaming job, and am
curious about the Back Pressure view in the job manager web UI. If there
are already docs for Back Pressure please feel free to just point me to
those. :)

When "Sampling in progress..." is displayed, what exactly is happening?

What do the values in the Ratio column for each Subtask mean exactly?

What does Status such as OK, High, etc mean? Are these determined from the
Ratio values?

If my job graph looks like Source => A => B => Sink, with Back Pressure OK
for Source and Sink, but High for A and B, what does that suggest?

Thanks,
Zach

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