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From "Martijn van Groningen (JIRA)" <>
Subject [jira] Commented: (SOLR-2205) Grouping performance improvements
Date Fri, 29 Oct 2010 16:47:21 GMT


Martijn van Groningen commented on SOLR-2205:

I think the only thing to do for the issue is to also port the changes made in TopGroupCollector
to TopGroupSortCollector. If that is done I think we can close this issue.

> Grouping performance improvements
> ---------------------------------
>                 Key: SOLR-2205
>                 URL:
>             Project: Solr
>          Issue Type: Sub-task
>          Components: search
>    Affects Versions: 4.0
>            Reporter: Martijn van Groningen
>             Fix For: 4.0
>         Attachments: SOLR-2205.patch, SOLR-2205.patch
> 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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