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Hudson commented on CASSANDRA-3855: ----------------------------------- Integrated in Cassandra #1734 (See [https://builds.apache.org/job/Cassandra/1734/]) fix incorrect hasIrrelevantData result for live CF; patch by yukim, reviewed by jbellis/slebresne for CASSANDRA-3855 (Revision d74103735126658d64cb92a16f4bb40f63d5e2e8) Result = ABORTED yukim : Files : * src/java/org/apache/cassandra/db/AbstractColumnContainer.java > RemoveDeleted dominates compaction time for large sstable counts > ---------------------------------------------------------------- > > Key: CASSANDRA-3855 > URL: https://issues.apache.org/jira/browse/CASSANDRA-3855 > Project: Cassandra > Issue Type: Bug > Components: Core > Affects Versions: 1.1.0 > Reporter: Stu Hood > Assignee: Yuki Morishita > Labels: compaction, deletes, leveled > Fix For: 1.2 > > Attachments: 3855.txt, with-cleaning-java.hprof.txt > > > With very large numbers of sstables (2000+ generated by a `bin/stress -n > 100,000,000` run with LeveledCompactionStrategy), > PrecompactedRow.removeDeletedAndOldShards dominates compaction runtime, such > that commenting it out takes compaction throughput from 200KB/s to 12MB/s. > Stack attached. -- 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