Michael Ho created IMPALA-7799:
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Summary: Store periodic snapshots of Impalad metrics
Key: IMPALA-7799
URL: https://issues.apache.org/jira/browse/IMPALA-7799
Project: IMPALA
Issue Type: Improvement
Components: Backend
Affects Versions: Impala 2.12.0, Impala 3.0, Impala 3.1.0
Reporter: Michael Ho
Currently, each Impala demon exposes a set of metrics exposed via the debug
webpage metrics page. While this may be very helpful for development, there are
many incidents in which one may want to record these metrics to do postmortem
analysis for various issues.
We should consider taking periodic snapshots of these Impalad metrics and
archive them for a certain retention period to allow for postmortem analysis.
We need to be mindful of the space usage concern.
To enable easier analysis, one may need to build a tool (or use some existing
off-the-shell libraries) to show the collected snapshots as time series and
calculate various statistics (e.g. mean, median, min, max etc).
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