Compaction degrades key cache stats
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Key: CASSANDRA-3325
URL: https://issues.apache.org/jira/browse/CASSANDRA-3325
Project: Cassandra
Issue Type: Bug
Affects Versions: 0.8.6
Reporter: Fabien Rousseau
Priority: Minor
When "compaction_preheat_key_cache" is set to true, then during compaction, it
keep tracks of cached keys to to re-cache their new position.
It does this by calling the following method on every key of the compacted
sstable :
sstable.getCachedPosition(row.key)
which also update cache stats, thus lowering hit rate
Below is an attached patch allowing to know if the key is cached, but without
updating the stats.
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