Andrzej Bialecki  updated SOLR-11061:
    Fix Version/s: master (8.0)

> Add a spins metric for all directory paths
> ------------------------------------------
>                 Key: SOLR-11061
>                 URL: https://issues.apache.org/jira/browse/SOLR-11061
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: metrics
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Andrzej Bialecki 
>             Fix For: master (8.0), 7.1
>         Attachments: SOLR-11061.patch
> See org.apache.lucene.util.IOUtils.spins. It currently only works for linux 
> and is used by ConcurrentMergeScheduler to set defaults for maxThreadCount 
> and maxMergeCount.
> We should expose this as a metric for solr.data.home and each core's data 
> dir. One thing to note is that the CMS overrides the value detected by the 
> spins method using {{lucene.cms.override_spins}} system property. This 
> property is supposed to be for tests but if it is set then the metrics API 
> should also take that into account.

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