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https://issues.apache.org/jira/browse/HBASE-22459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Purtell updated HBASE-22459:
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Attachment: (was: HBASE-22459-branch-2.patch)
> Expose store reader reference count
> -----------------------------------
>
> Key: HBASE-22459
> URL: https://issues.apache.org/jira/browse/HBASE-22459
> Project: HBase
> Issue Type: Improvement
> Components: HFile, metrics, regionserver
> Reporter: Andrew Purtell
> Assignee: Andrew Purtell
> Priority: Minor
> Fix For: 3.0.0, 1.5.0, 2.3.0
>
> Attachments: HBASE-22459-branch-1.patch, HBASE-22459-branch-1.patch,
> HBASE-22459-branch-2.patch, HBASE-22459-branch-2.patch, HBASE-22459.patch,
> HBASE-22459.patch
>
>
> Expose the reference count over a region's store file readers as a metric in
> region metrics and also as a new field in RegionLoad. This will make visible
> the reader reference count over all stores in the region to both metrics
> capture and anything that consumes ClusterStatus, like the shell's status
> command and the master UI.
> Coprocessors that wrap scanners might leak them, which will leak readers. We
> log when this happens but in order to notice the increasing trend of
> reference counts you have to scrape log output. It would be better if this
> information is also available as a metric.
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