Bruno Roustant created SOLR-15433:
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Summary: 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
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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