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https://issues.apache.org/jira/browse/HBASE-28246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wellington Chevreuil resolved HBASE-28246.
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Resolution: Fixed
Thanks for reviewing it, [~psomogyi]! Merged into master, branch-3 and branch-2.
> Expose region cached size over JMX metrics and report in the RS UI
> ------------------------------------------------------------------
>
> Key: HBASE-28246
> URL: https://issues.apache.org/jira/browse/HBASE-28246
> Project: HBase
> Issue Type: Improvement
> Components: BucketCache
> Affects Versions: 2.6.0, 3.0.0-alpha-4, 2.4.17, 2.5.6, 4.0.0-alpha-1
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Major
> Fix For: 3.0.0-beta-1, 4.0.0-alpha-1
>
> Attachments: Screenshot 2023-12-06 at 22.58.17.png
>
>
> With large file based bucket cache, the prefetch executor can take long time
> to complete cache all of the dataset. It would be useful to report how much %
> of regions data is already cached, in order to give an idea of how much work
> prefetch executor has done.
> This PRs adds jmx metrics for region cache % and also reports the same in the
> RS UI "Store File Metrics" tab as below:
> !Screenshot 2023-12-06 at 22.58.17.png|width=658,height=114!
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