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https://issues.apache.org/jira/browse/HBASE-20946?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hari Sekhon updated HBASE-20946:
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Summary: HMaster UI & JMX - warn if Major Compaction hasn't occurred after
hbase.hregion.majorcompaction time (was: HMaster UI / JMX - warn if Major
Compaction hasn't occurred after hbase.hregion.majorcompaction time)
> HMaster UI & JMX - warn if Major Compaction hasn't occurred after
> hbase.hregion.majorcompaction time
> ----------------------------------------------------------------------------------------------------
>
> Key: HBASE-20946
> URL: https://issues.apache.org/jira/browse/HBASE-20946
> Project: HBase
> Issue Type: Improvement
> Components: API, Compaction, master, metrics, monitoring, UI
> Affects Versions: 3.0.0, 1.1.2, 2.2.0
> Reporter: Hari Sekhon
> Priority: Major
>
> HMaster UI + a JMX field should warn if Major Compaction hasn't occurred and
> completed successfully after the scheduling interval
> hbase.hregion.majorcompaction (default 7 days).
> Recent changes in HBase HBASE-6028 mean major compactions could be cancelled
> and result in read amplification over time. HMaster UI should monitor time
> since last major compaction completed successfully isn't greater than
> hbase.hregion.majorcompaction (plus some fudge factor).
> If hbase.hregion.majorcompaction is zero then disable the check, as external
> tooling will trigger major compactions off peak and should instead monitor
> against JMX timestamp of last major compaction as per HBASE-20945.
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