[jira] [Comment Edited] (SOLR-14639) Improve concurrency of SlowCompositeReaderWrapper.terms

["Ishan Chattopadhyaya (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-14639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17154652#comment-17154652 ] 

Ishan Chattopadhyaya edited comment on SOLR-14639 at 7/9/20, 3:10 PM:
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I have a client who is experiencing very similar symptoms with Collapse QParser (that uses SCRW). Higher latency during high concurrency, but no significant CPU load increase.


was (Author: ichattopadhyaya):
I have a client who is experiencing very similar symptoms with Collapse QParser. Higher latency during high concurrency, but no significant CPU load increase.

> Improve concurrency of SlowCompositeReaderWrapper.terms
> -------------------------------------------------------
>
>                 Key: SOLR-14639
>                 URL: https://issues.apache.org/jira/browse/SOLR-14639
>             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
>            Priority: Major
>         Attachments: Screen Shot 2020-07-09 at 4.38.03 PM.png
>
>
> Under heavy query load, the ConcurrentHashMap.computeIfAbsent method inside the SlowCompositeReaderWrapper.terms(String) method blocks searcher threads (see attached screenshot of a java flight recording).



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