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From "Andrzej Bialecki (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SOLR-11061) Add a spins metric for all directory paths
Date Thu, 03 Aug 2017 16:56:00 GMT

     [ https://issues.apache.org/jira/browse/SOLR-11061?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrzej Bialecki  reassigned SOLR-11061:
----------------------------------------

    Assignee: Andrzej Bialecki 

> 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: 7.1
>
>
> 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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