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https://issues.apache.org/jira/browse/OAK-6726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chetan Mehrotra resolved OAK-6726.
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Resolution: Fixed
Fix Version/s: 1.7.9
Done with 1809804
> Use addDocument instead of updateDocument while reindexing with Lucene
> ----------------------------------------------------------------------
>
> Key: OAK-6726
> URL: https://issues.apache.org/jira/browse/OAK-6726
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: lucene
> Reporter: Chetan Mehrotra
> Assignee: Chetan Mehrotra
> Priority: Minor
> Fix For: 1.8, 1.7.9
>
>
> Currently the DefaultIndexWriter uses
> [updateDocument|https://lucene.apache.org/core/4_7_1/core/org/apache/lucene/index/IndexWriter.html#updateDocument(org.apache.lucene.index.Term,
> java.lang.Iterable)] while adding/updating document in index. This is fine
> for incremental indexing where we cannot be sure if index already has that
> entry. This call first does a search for existing document matching the term
> and then deletes and add the new document
> However for reindex case where we start from empty index we can use
> [addDocument|https://lucene.apache.org/core/4_7_1/core/org/apache/lucene/index/IndexWriter.html#addDocument(java.lang.Iterable)].
> This avoids the extra work for search
> In test where index had ~70M entries switch to addDocument resulted in 10 min
> reduction in reindexing timings
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