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From "Martijn van Groningen (JIRA)" <>
Subject [jira] Created: (SOLR-2205) Grouping performance improvements
Date Thu, 28 Oct 2010 17:44:21 GMT
Grouping performance improvements

                 Key: SOLR-2205
             Project: Solr
          Issue Type: Sub-task
          Components: search
    Affects Versions: 4.0
            Reporter: Martijn van Groningen
             Fix For: 4.0

This issue is dedicated to the performance of the grouping functionality.

I've noticed that the code is not really performing on large indexes. Doing a search (q=*:*)
with grouping on an index from around 5M documents took around one second on my local development
machine. We had to support grouping on an index that holds around 50M documents per machine,
so we made some changes and were able to happily serve that amount of documents. Patch will
follow soon.

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