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https://issues.apache.org/jira/browse/SOLR-342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12567152#action_12567152
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Yonik Seeley commented on SOLR-342:
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Thanks Will. My guess at this point is a merging bug in Lucene, so you might
be able to reproduce by forcing more merges. Make mergeFacor=2 and lower how
many docs it takes to do a merge (set maxBufferedDocs to 2, or set
ramBufferSizeMB to 1).
> Add support for Lucene's new Indexing and merge features (excluding
> Document/Field/Token reuse)
> -----------------------------------------------------------------------------------------------
>
> Key: SOLR-342
> URL: https://issues.apache.org/jira/browse/SOLR-342
> Project: Solr
> Issue Type: Improvement
> Components: update
> Reporter: Grant Ingersoll
> Assignee: Grant Ingersoll
> Priority: Minor
> Attachments: copyLucene.sh, SOLR-342.patch, SOLR-342.patch,
> SOLR-342.patch, SOLR-342.tar.gz
>
>
> LUCENE-843 adds support for new indexing capabilities using the
> setRAMBufferSizeMB() method that should significantly speed up indexing for
> many applications. To fix this, we will need trunk version of Lucene (or
> wait for the next official release of Lucene)
> Side effect of this is that Lucene's new, faster StandardTokenizer will also
> be incorporated.
> Also need to think about how we want to incorporate the new merge scheduling
> functionality (new default in Lucene is to do merges in a background thread)
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