[ https://issues.apache.org/jira/browse/CASSANDRA-3325?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Ellis updated CASSANDRA-3325: -------------------------------------- Reviewer: jbellis Component/s: Core Affects Version/s: (was: 0.8.6) 0.7.0 Fix Version/s: 1.0.0 Labels: compaction (was: ) > Compaction degrades key cache stats > ----------------------------------- > > Key: CASSANDRA-3325 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3325 > Project: Cassandra > Issue Type: Bug > Components: Core > Affects Versions: 0.7.0 > Reporter: Fabien Rousseau > Priority: Minor > Labels: compaction > Fix For: 1.0.0 > > Attachments: 001-CASSANDRA-3325.patch > > > 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