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https://issues.apache.org/jira/browse/SOLR-6752?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14218010#comment-14218010
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Mark Miller commented on SOLR-6752:
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bq. SolrSOLR-6752 Buffer Cache allocate/lost should be exposed through JMX
I'm a little confused by the title - isn't this simply exposing hdfds block
cache metrics via JMX? Why anything specific about allocate/lost? I see all
sorts of stats in the getStatistics call.
We also probably want to try and align some of the stat key names with other
cache objects in Solr: the query cache, filter cache, etc.
Also, I don't believe these will get registered with the jmx server. I think
only the top level class for a plugin is by default - eg the
HdfsDirectoryFactory itself.
> Buffer Cache allocate/lost should be exposed through JMX
> --------------------------------------------------------
>
> Key: SOLR-6752
> URL: https://issues.apache.org/jira/browse/SOLR-6752
> Project: Solr
> Issue Type: Bug
> Reporter: Mike Drob
> Assignee: Mark Miller
> Labels: metrics
> Attachments: SOLR-6752.patch
>
>
> Currently, {{o.a.s.store.blockcache.Metrics}} has fields for tracking buffer
> allocations and losses, but they are never updated nor exposed to a receiving
> metrics system. We should do both.
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