Stephan Ewen created FLINK-15603:
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Summary: Show "barrier lag" in checkpoint statistics
Key: FLINK-15603
URL: https://issues.apache.org/jira/browse/FLINK-15603
Project: Flink
Issue Type: Improvement
Components: Runtime / Web Frontend
Reporter: Stephan Ewen
Fix For: 1.11.0
One of the most important metrics is missing in the checkpoint stats: "barrier
lag", meaning the time it between when the checkpoint was triggered and when
the barriers arrive at a task.
That time is critical to identify if a checkpoint takes too long because of
backpressure or other contention.
You can implicitly calculate this by "end_to_end_time - sync_time -
async_time", but it is much more obvious for users that something is up when
this number is explicitly shown.
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