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 20:15:00 UTC
[jira] [Commented] (CASSANDRA-9345) LeveledCompactionStrategy bad
performance
[ https://issues.apache.org/jira/browse/CASSANDRA-9345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14538336#comment-14538336 ]
Alan Boudreault commented on CASSANDRA-9345:
--------------------------------------------
//cc [~carlyeks] [~enigmacurry]
> 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)