Wellington Chevreuil created HBASE-28246:
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Summary: 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
Reporter: Wellington Chevreuil
Assignee: Wellington Chevreuil
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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