You are viewing a plain text version of this content. The canonical link for it is here.

Posted to commits@cassandra.apache.org by "Alan Boudreault (JIRA)" <ji...@apache.org> on 2015/05/11 20:11:00 UTC

[jira] [Created] (CASSANDRA-9345) LeveledCompactionStrategy bad performance

Alan Boudreault created CASSANDRA-9345:
------------------------------------------

             Summary: LeveledCompactionStrategy bad performance
                 Key: CASSANDRA-9345
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9345
             Project: Cassandra
          Issue Type: Bug
            Reporter: Alan Boudreault
             Fix For: 3.0
         Attachments: temperature.yaml

While working on CASSANDRA-7409, we noticed that there were some bad performance with LCS. It seems that the compaction is not triggered as it should. The performance is really bad when using low heap but we can also see that using a big heap there are something wrong with the number of compactions.

(Take care when visualizing the graphs, the y-axis scales differ due to some peaks) 
http://dl.alanb.ca/perf/lcs-2.1-vs-trunk-LH.html
http://dl.alanb.ca/perf/lcs-2.1-vs-trunk-BH.html

I've attached the stress yaml config used for this test.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)