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From "Atri Sharma (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-8757) Better Segment To Thread Mapping Algorithm
Date Fri, 10 May 2019 09:02:00 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-8757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Atri Sharma updated LUCENE-8757:
--------------------------------
    Attachment: LUCENE-8757.patch

> Better Segment To Thread Mapping Algorithm
> ------------------------------------------
>
>                 Key: LUCENE-8757
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8757
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Atri Sharma
>            Priority: Major
>         Attachments: LUCENE-8757.patch, LUCENE-8757.patch, LUCENE-8757.patch, LUCENE-8757.patch
>
>
> The current segments to threads allocation algorithm always allocates one thread per
segment. This is detrimental to performance in case of skew in segment sizes since small segments
also get their dedicated thread. This can lead to performance degradation due to context switching
overheads.
>  
> A better algorithm which is cognizant of size skew would have better performance for
realistic scenarios



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