tianhang tang created HBASE-27681:
-------------------------------------

             Summary: Refactor Table Latency Metrics
                 Key: HBASE-27681
                 URL: https://issues.apache.org/jira/browse/HBASE-27681
             Project: HBase
          Issue Type: Improvement
            Reporter: tianhang tang
            Assignee: tianhang tang
         Attachments: image-2023-03-01-23-55-14-095.png, 
image-2023-03-01-23-56-16-819.png

Benefit:
# Table Latency Metrics could removed after table has been moved away. Fix 
[HBASE-27617|https://issues.apache.org/jira/browse/HBASE-27617]
# Could remove the hash lookup caused by metrics map from the hot request path.
# Reduce the output in jmx. As if we use jmx_exporter to collect metrics to 
Prometheus, the operation overhead of performing regular matching in metric is 
relatively high(especially region metrics, which might be next step).
# I think that could be the first step after hbase-metrics released. It seems 
that the roadmap indicates that we should replace hadoop-metrics2 with 
hbase-metrics.


Influence:
# The metrics structure in jmx will change.

Old:  !image-2023-03-01-23-55-14-095.png! 
New:  !image-2023-03-01-23-56-16-819.png! 



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