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From "Atri Sharma (JIRA)" <>
Subject [jira] [Updated] (LUCENE-8675) Divide Segment Search Amongst Multiple Threads
Date Thu, 18 Apr 2019 12:11:00 GMT


Atri Sharma updated LUCENE-8675:
    Attachment: TermHighFreqP90.png

> Divide Segment Search Amongst Multiple Threads
> ----------------------------------------------
>                 Key: LUCENE-8675
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/search
>            Reporter: Atri Sharma
>            Priority: Major
>         Attachments: PhraseHighFreqP50.png, PhraseHighFreqP90.png, TermHighFreqP50.png,
> Segment search is a single threaded operation today, which can be a bottleneck for large
analytical queries which index a lot of data and have complex queries which touch multiple
segments (imagine a composite query with range query and filters on top). This ticket is for
discussing the idea of splitting a single segment into multiple threads based on mutually
exclusive document ID ranges.
> This will be a two phase effort, the first phase targeting queries returning all matching
documents (collectors not terminating early). The second phase patch will introduce staged
execution and will build on top of this patch.

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