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From "Martin Grotzke (JIRA)" <>
Subject [jira] [Created] (SOLR-2583) Make external scoring more efficient (ExternalFileField, FileFloatSource)
Date Thu, 09 Jun 2011 09:46:58 GMT
Make external scoring more efficient (ExternalFileField, FileFloatSource)

                 Key: SOLR-2583
             Project: Solr
          Issue Type: Improvement
          Components: search
            Reporter: Martin Grotzke
            Priority: Minor

External scoring eats much memory, depending on the number of documents in the index. The
ExternalFileField (used for external scoring) uses FileFloatSource, where one FileFloatSource
is created per external scoring file. FileFloatSource creates a float array with the size
of the number of docs (this is also done if the file to load is not found). If there are much
less entries in the scoring file than there are number of docs in total the big float array
wastes much memory.

This could be optimized by using a map of doc -> score, so that the map contains as many
entries as there are scoring entries in the external file, but not more.

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