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https://issues.apache.org/jira/browse/OAK-2596?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Dürig reassigned OAK-2596:
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Assignee: Michael Dürig
> more (jmx) instrumentation for observation queue
> ------------------------------------------------
>
> Key: OAK-2596
> URL: https://issues.apache.org/jira/browse/OAK-2596
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.0.12
> Reporter: Stefan Egli
> Assignee: Michael Dürig
> Fix For: 1.0.13
>
>
> While debugging issues with the observation queue it would be handy to have
> more detailed information available. At the moment you can only see one value
> wrt length of the queue: that is the maximum of all queues. It is unclear if
> the queue is that long for only one or many listeners. And it is unclear from
> that if the listener is slow or the engine that produces the events for the
> listener.
> So I'd suggest to add the following details - possible exposed via JMX? :
> * add queue length details to each of the observation listeners
> * have a history of the last, eg 1000 events per listener showing a) how long
> the event took to be created/generated and b) how long the listener took to
> process. Sometimes averages are not detailed enough so such a in-depth
> information might become useful. (Not sure about the feasibility of '1000'
> here - maybe that could be configurable though - just putting the idea out
> here).
> ** have some information about whether a listener is currently 'reading
> events from the cache' or whether it has to go to eg mongo
> * maybe have a 'top 10' listeners that have the largest queue at the moment
> to easily allow navigation instead of having to go through all (eg 200)
> listeners manually each time.
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