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https://issues.apache.org/jira/browse/SOLR-2906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13154344#comment-13154344
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Shawn Heisey commented on SOLR-2906:
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I've re-added lastAccessed to the class, as a tiebreaker when hitcount is equal.
The test method prints out leastUsedItems and mostUsedItems. Somehow, item
number 50 is included in both.
> 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
> Priority: Minor
> Attachments: ConcurrentLFUCache.java, ConcurrentLFUCache.java,
> ConcurrentLFUCache.java, FastLFUCache.java, FastLFUCache.java, LFUCache.java,
> TestLFUCache.java
>
>
> Implement an LFU (Least Frequently Used) cache as the first step towards a
> full ARC cache
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