[jira] [Updated] (SOLR-2906) Implement LFU Cache

["Shawn Heisey (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-2906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shawn Heisey updated SOLR-2906:
-------------------------------

    Attachment: FastLFUCache.java
                ConcurrentLFUCache.java

Here is the first crack at an LFU implementation.  There's some weirdness with negative numbers in the statistics, and I'm not sure that eviction and warming are working right, but I am having trouble getting a test environment fully operational.
                
> 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, FastLFUCache.java
>
>
> Implement an LFU (Least Frequently Used) cache as the first step towards a full ARC cache

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