cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Alan Boudreault (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9345) LeveledCompactionStrategy bad performance
Date Mon, 11 May 2015 18:19:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9345?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14538344#comment-14538344
] 

Alan Boudreault commented on CASSANDRA-9345:
--------------------------------------------

[~jbellis] Tested 2.1 and I reproduce this only with trunk. (Updated the description with
that info). My graphs include 2.1 AND trunk.

> LeveledCompactionStrategy bad performance
> -----------------------------------------
>
>                 Key: CASSANDRA-9345
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9345
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Alan Boudreault
>            Assignee: Carl Yeksigian
>             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)

Mime
View raw message