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From "Martijn van Groningen (JIRA)" <>
Subject [jira] [Commented] (SOLR-2564) Integrating grouping module into Solr 4.0
Date Thu, 09 Jun 2011 22:02:00 GMT


Martijn van Groningen commented on SOLR-2564:

But I think caching should still default to on, just limited as a pctg
of the number of docs in the index. Ie, by default we will cache the
result set if it's less than 20% (say) of total docs in your index.
Maybe instead of specifying a maximum size for the second pass cache, we could specify it
with a percentage (0 till 100) relative from maxdoc. In this case when the index grows in
number of documents the cache is still used for a lot of queries (depending on the specified
percentage). So if we go with this maybe group.cacheMB should be renamed to group.cache.percentage.
The default can then be something like 20. Any thoughts about this?

> Integrating grouping module into Solr 4.0
> -----------------------------------------
>                 Key: SOLR-2564
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Martijn van Groningen
>            Assignee: Martijn van Groningen
>             Fix For: 4.0
>         Attachments: LUCENE-2564.patch, SOLR-2564.patch, SOLR-2564.patch, SOLR-2564.patch,
SOLR-2564.patch, SOLR-2564.patch
> Since work on grouping module is going well. I think it is time to wire this up in Solr.
> Besides the current grouping features Solr provides, Solr will then also support second
pass caching and total count based on groups.

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