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] [Updated] (CASSANDRA-9345) LeveledCompactionStrategy bad performance
Date Tue, 12 May 2015 00:26:00 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-9345?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alan Boudreault updated CASSANDRA-9345:
---------------------------------------
    Description: 
--> This issue doesn't affect any release and is only reproducible in a dev branch 

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.

Here are the graphs that compare 2.1 vs the dev branch (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.

  was:
** This issue doesn't affect any release and is only reproducable in a dev branch **

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.

Here are the graphs that compare 2.1 vs the dev branch (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.


> 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
>         Attachments: temperature.yaml
>
>
> --> This issue doesn't affect any release and is only reproducible in a dev branch

> 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.
> Here are the graphs that compare 2.1 vs the dev branch (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