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https://issues.apache.org/jira/browse/SOLR-2889?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13148078#comment-13148078
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Yonik Seeley commented on SOLR-2889:
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bq. It's reasonable to expect that process to happen on new additions to what
is a singular project.
Sorry, no. It's completely unrelated. Adding conditional numHits per entry to
FastLRUCache would be a small simple change. Trying to figure out what/how to
refactor Solr's current caching into a module is at least an order of magnitude
(or two) harder. You can tackle that anytime you feel like it, but don't force
it on anyone else.
> 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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