virajjasani commented on pull request #3838:
URL: https://github.com/apache/hbase/pull/3838#issuecomment-967277753


   While not exact `top` command style view, but we do have balancer 
observability using the NamedQueue framework (opt-in feature): HBASE-24528 that 
provides recent balancer run's cost functions. On other other hand, using the 
same framework, we can also avail recent balancer rejection factors (opt-in 
feature) HBASE-25790.
   With HBASE-25791, we also have UI of recent balancer history (using the same 
underlying framework). If we really want to combine both `read recent balancer 
decision/rejection and it's associated cost functions` as well as `when was the 
last time it was executed`, I think we might want to attach timestamp with 
these BalancerDecision/BalancerRejection objects?


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