Stefan Egli created OAK-1484:
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             Summary: additional observation queue jmx attributes
                 Key: OAK-1484
                 URL: https://issues.apache.org/jira/browse/OAK-1484
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: commons
    Affects Versions: 0.17.1
            Reporter: Stefan Egli


The following jmx attributes would be very useful to have, when debugging 
problems or checking the health of observation listeners and queues at runtime:

 * length of an observation listener's event queue
 * duration of stay of oldest event in an observation listener's event queue

Especially the second point can be used to judge if an observation listener is 
'healthy' or not: eg if the duration is a few seconds, things are probably 
fine. If the duration is over a minute, then that could raise a flag.



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