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https://issues.apache.org/jira/browse/SOLR-15433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17361550#comment-17361550
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ASF subversion and git services commented on SOLR-15433:
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Commit 26d3f951623810efbc563ea04470d384f84ba590 in solr's branch
refs/heads/main from Bruno Roustant
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=26d3f95 ]
SOLR-15433: Replace transient core cache LRU by Caffeine cache.
> Replace basic LRU by Caffeine Cache for transient core cache
> ------------------------------------------------------------
>
> Key: SOLR-15433
> URL: https://issues.apache.org/jira/browse/SOLR-15433
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Bruno Roustant
> Priority: Major
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> Currently TransientSolrCoreCacheDefault uses a basic LinkedList LRU cache to
> store loaded transient cores. This can easily be replaced by the much more
> effective Caffeine Cache.
> For example, with the current simple LRU when new cores are added, the least
> recently accessed cores are evicted. So when a bunch of rarely used transient
> cores are opened for punctual access (and added temporarily to the cache)
> this causes the eviction of a bunch of regularly accessed cores. However this
> case is nicely handled by the Caffeine Cache which keeps the regularly
> accessed cores.
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