elasticsearch/elasticsearch — pull request #8112 by s1monw (2014-10-16 14:43:02+00:00)
Title: [CACHE] Expose concurrency_level on all caches

The concurrency level allows to configure the cache internal segments
used to cache data. This can have direct impact on evicition rates since
memory bound caches are equally divided into segments which can cause
early evictions if cache entries are not well balanced.

Relates to #7836