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https://issues.apache.org/jira/browse/SOLR-2058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12904352#action_12904352
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Ron Mayer commented on SOLR-2058:
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Also wanted to note - I've been using this on a QA machine with 4 million
documents, and it has been working extremely well for me; with multiple
simultaneous phrase slop.
In particular, if I use:
* a high boost (500) on pf with slop of 0
* a moderate boost (50) on pf with a slop of 50
* a moderate boost (50) on pf2 with a slop of 0
* a low boost (10) on pf2 with a slop of 10
it's doing a *great* job of getting the most relevant document in the #1 spot,
and a very good job at getting the entire first page of results filled with
highly relevant documents.
> Adds optional "phrase slop" to edismax "pf2", "pf3" and "pf" parameters with
> field~slop^boost syntax
> ----------------------------------------------------------------------------------------------------
>
> Key: SOLR-2058
> URL: https://issues.apache.org/jira/browse/SOLR-2058
> Project: Solr
> Issue Type: Improvement
> Components: SearchComponents - other
> Affects Versions: 3.1, 4.0
> Environment: n/a
> Reporter: Ron Mayer
> Priority: Minor
> Attachments: pf2_with_slop.patch
>
>
> http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201008.mbox/%[email protected]%3e
> {quote}
> From Ron Mayer <[email protected]>
> ... my results might be even better if I had a couple different "pf2"s with
> different "ps"'s at the same time. In particular. One with ps=0 to put a
> high boost on ones the have the right ordering of words. For example
> insuring that [the query]:
> "red hat black jacket"
> boosts only documents with "red hats" and not "black hats". And another
> pf2 with a more modest boost with ps=5 or so to handle the query above also
> boosting docs with
> "red baseball hat".
> {quote}
> [http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201008.mbox/%[email protected]%3e]
> {quote}
> From Yonik Seeley <[email protected]>
> Perhaps fold it into the pf/pf2 syntax?
> pf=text^2 // current syntax... makes phrases with a boost of 2
> pf=text~1^2 // proposed syntax... makes phrases with a slop of 1 and
> a boost of 2
> That actually seems pretty natural given the lucene query syntax - an
> actual boosted sloppy phrase query already looks like
> {{text:"foo bar"~1^2}}
> -Yonik
> {quote}
> [http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201008.mbox/%[email protected]%3e]
> {quote}
> From Chris Hostetter <[email protected]>
> Big +1 to this idea ... the existing "ps" param can stick arround as the
> default for any field that doesn't specify it's own slop in the pf/pf2/pf3
> fields using the "~" syntax.
> -Hoss
> {quote}
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