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https://issues.apache.org/jira/browse/OAK-5588?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Dürig updated OAK-5588:
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Issue Type: Improvement (was: Wish)
> Improve Session stats.
> ----------------------
>
> Key: OAK-5588
> URL: https://issues.apache.org/jira/browse/OAK-5588
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core
> Reporter: Ian Boston
> Labels: monitoring, production
> Fix For: 1.8
>
>
> Currently each session has a SessionsStats MBean. Omongst other things it
> records the total number or refresh operations. It also records the rate of
> refresh operations, although this number in its current form is not usefull
> as the rate is the number of refresh operations/session lifetime. It would
> be much better to have a set of stats related to classes of users that
> recorded proper metrics in a consistent way. eg 1 metric set per
> service-user, 1 for the admin user and perhaps 1 for all normal users. Each
> would record m1,m5,m15 rates, total count, p50,p75,p95,p99,p999 durations
> with mean and stdev then 2 sets of metrics could be compared and monitored
> without having to look at the code to work out how the metric was calculated.
> Oak has metrics support to do this, minimal code would be required.
> I dont think it would be viable to have 1 metric per unique session (too much
> overhead, too much data, good for devs but bad for production), and in fact
> having 1 JMX MBean per unique session is likely to cause problems with
> everything connected to JMX even the ManagementServer can cope. Same goes for
> the other proliferation of MBeans in the Oak 1.6. Perhaps a review of JMX in
> Oak is due.
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