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https://issues.apache.org/jira/browse/IMPALA-11553?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Smith resolved IMPALA-11553.
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Fix Version/s: Impala 4.4.0
Resolution: Fixed
> Add events specific metrics on table level
> ------------------------------------------
>
> Key: IMPALA-11553
> URL: https://issues.apache.org/jira/browse/IMPALA-11553
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Quanlong Huang
> Assignee: Sai Hemanth Gantasala
> Priority: Major
> Fix For: Impala 4.4.0
>
> Attachments: Events_delay.png, events_duration.png
>
>
> Currently, we have global metrics for event-processor in catalogd's web UI:
> ||Name||Value||Description||
> |{{events-processor.avg-events-fetch-duration}}|989ms|Average time taken to
> fetch a batch of metastore events|
> |{{events-processor.avg-events-process-duration}}|0|Average time taken to
> process a batch of events received from metastore|
> |{{events-processor.events-received}}|0|Total number of metastore events
> received|
> |{{events-processor.events-received-15min-rate}}|0.000000|Exponentially
> weighted moving average (EWMA) of number of events received in last 15 min|
> |{{events-processor.events-received-1min-rate}}|0.000000|Exponentially
> weighted moving average (EWMA) of number of events received in last 1 min|
> |{{events-processor.events-received-5min-rate}}|0.000000|Exponentially
> weighted moving average (EWMA) of number of events received in last 5 min|
> |{{events-processor.events-skipped}}|0|Total number of metastore events
> skipped|
> |{{events-processor.last-synced-event-id}}|734979|Last metastore event id
> that the catalog server processed and synced to|
> |{{events-processor.status}}|ACTIVE|Metastore event processor status|
> Some metrics can be added for table level, e.g. {{avg-events-process-duration
> (also extend it to measure the last 30min, 1h, 24h)}}
> This helps users to find which tables are causing the event-processor lagging
> behind. So they can disable event-processor on them as a workaround.
> This Jira also tracks a metric at events-processor level
> 'events-consuming-delay' to gauge how much is taken by events-processor to
> consume the generated events.
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