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https://issues.apache.org/jira/browse/SOLR-2889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13148003#comment-13148003
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Jason Rutherglen commented on SOLR-2889:
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+1 - Put it in Lucene and NOT Solr. thanks.
When this is implemented, using Google collections should be developed as well
(which appropriately jettisons the cache values before OOM), ala the previously
created though not committed SOLR-1513.
> Implement Adaptive Replacement Cache
> ------------------------------------
>
> Key: SOLR-2889
> URL: https://issues.apache.org/jira/browse/SOLR-2889
> Project: Solr
> Issue Type: New Feature
> Components: search
> Affects Versions: 3.4
> Reporter: Shawn Heisey
> Priority: Minor
>
> Currently Solr's caches are LRU, which doesn't look at hitcount to decide
> which entries are most important. There is a method that takes both
> frequency and time of cache hits into account:
> http://en.wikipedia.org/wiki/Adaptive_Replacement_Cache
> If it's feasible, this could be a good addition to Solr/Lucene.
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