Jake Maes created SAMZA-1356:
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Summary: Improve monitoring for state restore
Key: SAMZA-1356
URL: https://issues.apache.org/jira/browse/SAMZA-1356
Project: Samza
Issue Type: Bug
Reporter: Jake Maes
Assignee: Jake Maes
There are a couple problems that can affect our ability to troubleshoot state
restore from changelog.
1. KeyValueStorageEngine logs a message for every 1M messages restored, but it
doesn't print anything for smaller stores. We should add a message to report
the final number of entries restored.
2. While the "restore-time" metric is a gauge, the KeyValueStorageEngineMetrics
"messages-restored" and "messages-bytes" are both counters, and counters are
often reported in terms of deltas so the value disappears after one data point.
Since these values only matter for the beginning of the job, we should switch
them to gauges so the value is retained for later monitoring.
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