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https://issues.apache.org/jira/browse/SOLR-3141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13211401#comment-13211401
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Mark Miller commented on SOLR-3141:
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bq. With Lucene 3.x there is really no slowdown at all caused by multiple
segments, as each segment is searched on its own with no interaction and just
the results added to same priority queue.
Do we have benchmarks for this in some issue - would love to see some numbers.
So, in the past, sorting certainly added a cost to multiple segments as you
moved from segment to segment - did that go away in some issue? That must be
completely different code these days if 100 segments or more performs like one.
> Deprecate OPTIMIZE command in Solr
> ----------------------------------
>
> Key: SOLR-3141
> URL: https://issues.apache.org/jira/browse/SOLR-3141
> Project: Solr
> Issue Type: Improvement
> Components: update
> Affects Versions: 3.5
> Reporter: Jan Høydahl
> Labels: force, optimize
> Fix For: 3.6
>
>
> Background: LUCENE-3454 renames optimize() as forceMerge(). Please read that
> issue first.
> Now that optimize() is rarely necessary anymore, and renamed in Lucene APIs,
> what should be done with Solr's ancient optimize command?
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