jihoonson commented on issue #10378:
URL: https://github.com/apache/druid/issues/10378#issuecomment-693130076


   Hi @mghosh4, thanks for the nice proposal! 
   
   > * `taskSlot/total/count`: Total number of task slots per emission period
   > * `taskSlot/idle/count`: Total number of task slots available for adding 
tasks
   > * `taskSlot/used/count`: Total number of task slots being currently used
   
   These 3 metrics will be definitely useful! To be honest, I can't believe we 
don't have these yet.
   
   > * `taskSlot/lazy/count`: Total number of task slots that have been marked 
lazy
   > * `taskSlot/blacklisted/count`: Total task slots of peons that have been 
blacklisted
   
   I think there 2 metrics will fit better to middleManagers/indexers rather 
than task slots, since middleManager/indexers can be marked as lazy or 
blacklisted, not individual task slot. How about `worker/lazy/count` and 
`worker/blacklisted/count` (or `indexingWorker/lazy/count` and 
`indexingWorker/blacklisted/count`)?


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