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https://issues.apache.org/jira/browse/OAK-3698?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15171934#comment-15171934
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Teodor Rosu commented on OAK-3698:
----------------------------------

In the OAK-3478 and OAK-3654 context: 

IIUC: This improvement translates to exposing the stats already available for 
observation / event listeners ( ConsolidatedListenerMbean and others ) using 
the new oak core stats api ( OAK-3654  ). This should simplify monitoring with 
external tools.

/cc [~ianeboston]

> Make it easier to monitor state of observation queue 
> -----------------------------------------------------
>
>                 Key: OAK-3698
>                 URL: https://issues.apache.org/jira/browse/OAK-3698
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: core
>            Reporter: Michael Marth
>            Priority: Minor
>              Labels: observation
>
> As suggest offline by [~ianeboston]:
> expose some stats (not time series!) to make it easier to monitor the state 
> of the observation queue, in particular:
> * number of items in queue
> * number of items entering queue
> * number of items leaving queue
> * percentage of queue size compared to the upper limit by when events get 
> collapsed



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