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From "Atri Sharma (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-8757) Better Segment To Thread Mapping Algorithm
Date Tue, 09 Apr 2019 11:14:00 GMT
Atri Sharma created LUCENE-8757:
-----------------------------------

             Summary: 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


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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