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From: Andrew Ingram <andrew.ingram@tangentlabs.co.uk>
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Subject: Removing empty dynamic fields from a Solr 1.4 index
Date: Fri, 17 Feb 2012 11:50:39 +0000
Message-Id: <8D700AE0-6D21-4C9E-9AF5-E9929898325A@tangentlabs.co.uk>
To: solr-user@lucene.apache.org
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Hi all

(Note: this question is cross-posted on stackoverflow: =
http://stackoverflow.com/questions/9327542/removing-empty-dynamic-fields-f=
rom-a-solr-1-4-index)

I have a Solr index that uses quite a few dynamic fields. I've recently =
changed my code to reduce the amount of data we index with Solr, =
significantly reducing the number of dynamic fields that are in use.

I've reindexed my data, and the doc count (as displayed in the admin =
schema browser) for the old fields has dropped to zero. But I'm confused =
as to why the fields still exist. I've done an optimize, and restarted =
the server, but I can't find any information on whether there's a way to =
get these fields to disappear.

Am I now stuck with these fields unless I recreate the index from =
scratch? We're talking about a significant reduction in fields (about =
200 -> 30), and I'm worried about the performance impact of keeping them =
floating around.

Thanks,=20
Andrew Ingram=