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https://issues.apache.org/jira/browse/SOLR-4735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15695829#comment-15695829
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Andrzej Bialecki commented on SOLR-4735:
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bq. Right now, each producer creates/manages its own set of metrics.
Correct, but if the producer's life-cycle is tied to that of SolrCore then the
lifecycle of that metric will be the same, ie it will vanish when that instance
of core is closed.
bq. My only concern here is how to namespace the metrics so that different
producers clash on metric names. Perhaps give each producer access to the core
name?
I think that the registration mechanism where SolrCore registers these metrics
for each plugin is ok - it would be similar to how it works in your patch,
except we would {{getOrCreate}} these metric instances instead of creating new
ones for each registration.
bq. Sounds good. One suggestion I have is to namespace the registries.
+1. In the pull request I used a core name, but that would be insufficient - it
needs to be made into a hierarchy, eg. "/core/<coreName>" for SolrCore metrics,
"/jetty/..." for Jetty metrics, etc.
> Improve Solr metrics reporting
> ------------------------------
>
> Key: SOLR-4735
> URL: https://issues.apache.org/jira/browse/SOLR-4735
> Project: Solr
> Issue Type: Improvement
> Reporter: Alan Woodward
> Assignee: Andrzej Bialecki
> Priority: Minor
> Attachments: SOLR-4735.patch, SOLR-4735.patch, SOLR-4735.patch,
> SOLR-4735.patch
>
>
> Following on from a discussion on the mailing list:
> http://search-lucene.com/m/IO0EI1qdyJF1/codahale&subj=Solr+metrics+in+Codahale+metrics+and+Graphite+
> It would be good to make Solr play more nicely with existing devops
> monitoring systems, such as Graphite or Ganglia. Stats monitoring at the
> moment is poll-only, either via JMX or through the admin stats page. I'd
> like to refactor things a bit to make this more pluggable.
> This patch is a start. It adds a new interface, InstrumentedBean, which
> extends SolrInfoMBean to return a
> [[Metrics|http://metrics.codahale.com/manual/core/]] MetricRegistry, and a
> couple of MetricReporters (which basically just duplicate the JMX and admin
> page reporting that's there at the moment, but which should be more
> extensible). The patch includes a change to RequestHandlerBase showing how
> this could work. The idea would be to eventually replace the getStatistics()
> call on SolrInfoMBean with this instead.
> The next step would be to allow more MetricReporters to be defined in
> solrconfig.xml. The Metrics library comes with ganglia and graphite
> reporting modules, and we can add contrib plugins for both of those.
> There's some more general cleanup that could be done around SolrInfoMBean
> (we've got two plugin handlers at /mbeans and /plugins that basically do the
> same thing, and the beans themselves have some weirdly inconsistent data on
> them - getVersion() returns different things for different impls, and
> getSource() seems pretty useless), but maybe that's for another issue.
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