Github user ben-manes commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/251#discussion_r113368843
--- Diff:
core/src/main/java/org/apache/accumulo/core/file/blockfile/cache/TinyLfuBlockCache.java
---
@@ -48,12 +52,13 @@
private final Cache<String,Block> cache;
private final Policy.Eviction<String,Block> policy;
private final ScheduledExecutorService statsExecutor;
+ private final Map<String,CacheEntry> weakEvictionMap = new
MapMaker().weakValues().makeMap();
--- End diff --
FYI, Caffeine also supports weak values so you could use two instances. It
has better concurrency and creates less garbage, whereas Guava's has slightly
better memory efficiency due to forking the hash table.
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