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From "Andrzej Bialecki (JIRA)" <>
Subject [jira] [Updated] (SOLR-11061) Add a spins metric for all directory paths
Date Wed, 09 Aug 2017 14:09:00 GMT


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

> Add a spins metric for all directory paths
> ------------------------------------------
>                 Key: SOLR-11061
>                 URL:
>             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 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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