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https://issues.apache.org/jira/browse/SOLR-2205?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yonik Seeley updated SOLR-2205:
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Attachment: SOLR-2205.patch
I've committed the first part of this patch that compares with the smallest
group first (before finding the group of the current doc). I also committed
the addition of the ord methods to DocValues (we need something like that
anyway).
Here's an additional patch that removes the second (redundant) comparison with
the lowest group (in addition to some other minor tweaks like removing the
boolean).
> Grouping performance improvements
> ---------------------------------
>
> Key: SOLR-2205
> URL: https://issues.apache.org/jira/browse/SOLR-2205
> 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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