Compaction degrades key cache stats ----------------------------------- 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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira