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From "Benedict (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9558) Cassandra-stress regression in 2.2
Date Wed, 24 Jun 2015 20:57:05 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14600135#comment-14600135
] 

Benedict commented on CASSANDRA-9558:
-------------------------------------

The reason I ask about the size of the cluster this is being tested on, is this worsens performance
as the cluster grows, as we coalesce fewer messages. So this could be improving our benchmark
performance at the expense of real-world performance.

> Cassandra-stress regression in 2.2
> ----------------------------------
>
>                 Key: CASSANDRA-9558
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9558
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Alan Boudreault
>            Assignee: T Jake Luciani
>             Fix For: 2.2.x
>
>         Attachments: 2.1.log, 2.2.log, CASSANDRA-9558-2.patch, CASSANDRA-9558-ProtocolV2.patch,
atolber-CASSANDRA-9558-stress.tgz, atolber-trunk-driver-coalescing-disabled.txt, stress-2.1-java-driver-2.0.9.2.log,
stress-2.1-java-driver-2.2+PATCH.log, stress-2.1-java-driver-2.2.log, stress-2.2-java-driver-2.2+PATCH.log,
stress-2.2-java-driver-2.2.log
>
>
> We are seeing some regression in performance when using cassandra-stress 2.2. You can
see the difference at this url:
> http://riptano.github.io/cassandra_performance/graph_v5/graph.html?stats=stress_regression.json&metric=op_rate&operation=1_write&smoothing=1&show_aggregates=true&xmin=0&xmax=108.57&ymin=0&ymax=168147.1
> The cassandra version of the cluster doesn't seem to have any impact. 
> //cc [~tjake] [~benedict]



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