Adrien Grand created SOLR-3486:
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             Summary: The memory size of Solr caches should be configurable
                 Key: SOLR-3486
                 URL: https://issues.apache.org/jira/browse/SOLR-3486
             Project: Solr
          Issue Type: Improvement
          Components: search
            Reporter: Adrien Grand
            Priority: Minor


It is currently possible to configure the sizes of Solr caches based on the 
number of entries of the cache. The problem is that the memory size of cached 
values may vary a lot over time (depending on IndexReader.maxDoc and the 
queries that are run) although the JVM heap size does not.

Having a configurable max size in bytes would also help optimize cache 
utilization, making it possible to store more values provided that they have a 
small memory footprint.

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