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Atri Sharma commented on LUCENE-8757: ------------------------------------- Attached is a first cut for the patch. The main idea there is that smaller segments are coalesced into single threads with a hard cap on the number of segments per thread to avoid overwhelming a single thread. This can be enhanced with taking number of cores on the machine and current CPU utilization, but that might lead to a higher IndexSearcher bootstrap time. Comments and thoughts are welcome. > 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 > > > 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 -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org