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Posted to issues@hbase.apache.org by "Wellington Chevreuil (Jira)" <ji...@apache.org> on 2023/12/06 23:04:00 UTC

[jira] [Created] (HBASE-28246) Expose region cached size over JMX metrics and report in the RS UI

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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