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Posted to issues@lucene.apache.org by "Shalin Shekhar Mangar (Jira)" <ji...@apache.org> on 2020/07/09 11:20:00 UTC

[jira] [Created] (SOLR-14640) Improve concurrency of SlowCompositeReaderWrapper.getSortedDocValues

Shalin Shekhar Mangar created SOLR-14640:
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             Summary: Improve concurrency of SlowCompositeReaderWrapper.getSortedDocValues
                 Key: SOLR-14640
                 URL: https://issues.apache.org/jira/browse/SOLR-14640
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
          Components: search
    Affects Versions: 8.4.1
            Reporter: Shalin Shekhar Mangar
         Attachments: Screen Shot 2020-07-09 at 4.46.46 PM.png

Under heavy query load, the synchronized HashMap {{cachedOrdMaps}} inside SlowCompositeReaderWrapper.getSortedDocValues blocks search threads.

See attached screenshot of a java flight recording from an affected node. 



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