Myasuka commented on a change in pull request #17686:
URL: https://github.com/apache/flink/pull/17686#discussion_r762671160
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File path: docs/content/docs/ops/monitoring/checkpoint_monitoring.md
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@@ -65,8 +65,7 @@ Note that for failed checkpoints, metrics are updated on a
best efforts basis an
- **Latest Acknowledgement**: The time when the latest acknowledgement for any
subtask was received at the JobManager (or n/a if no acknowledgement received
yet).
- **End to End Duration**: The duration from the trigger timestamp until the
latest acknowledgement (or n/a if no acknowledgement received yet). This end to
end duration for a complete checkpoint is determined by the last subtask that
acknowledges the checkpoint. This time is usually larger than single subtasks
need to actually checkpoint the state.
- **Checkpointed Data Size**: The checkpointed data size over all acknowledged
subtasks. If incremental checkpointing is enabled this value is the
checkpointed data size delta.
-- **Processed in-flight data**: The approximate number of bytes processed
during the alignment (time between receiving the first and the last checkpoint
barrier) over all acknowledged subtasks.
-- **Persisted in-flight data**: The number of bytes persisted during the
alignment (time between receiving the first and the last checkpoint barrier)
over all acknowledged subtasks. This is > 0 only if the unaligned checkpoints
are enabled.
+- **Processed (persisted) in-flight data**: The approximate number of bytes
processed during the alignment (time between receiving the first and the last
checkpoint barrier) over all acknowledged subtasks. `persisted in-flight
data`in round brackets mean the number of bytes persisted during the alignment
(time between receiving the first and the last checkpoint barrier) over all
acknowledged subtasks. This is > 0 only if the unaligned checkpoints are
enabled.
Review comment:
I think statement below looks better:
`The approximate number of bytes processed (persisted) during the alignment
(time between receiving the first and the last checkpoint barrier) over all
acknowledged subtasks. Persisted data could be larger than zero only if the
unaligned checkpoints are enabled.`
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