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https://issues.apache.org/jira/browse/SOLR-2906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13172605#comment-13172605
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Yonik Seeley commented on SOLR-2906:
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Actually, I was thinking count >>= 1 (divide by 2).
We could make it optional, but my gut feeling says it should be on by default.
> Implement LFU Cache
> -------------------
>
> Key: SOLR-2906
> URL: https://issues.apache.org/jira/browse/SOLR-2906
> Project: Solr
> Issue Type: Sub-task
> Components: search
> Affects Versions: 3.4
> Reporter: Shawn Heisey
> Assignee: Erick Erickson
> Priority: Minor
> Attachments: ConcurrentLFUCache.java, LFUCache.java, SOLR-2906.patch,
> SOLR-2906.patch, SOLR-2906.patch, SOLR-2906.patch, TestLFUCache.java
>
>
> Implement an LFU (Least Frequently Used) cache as the first step towards a
> full ARC cache
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