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Date: Mon, 13 Jul 2015 22:49:05 +0000 (UTC)
From: "Ariel Weisberg (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
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Subject: [jira] [Commented] (CASSANDRA-9683) Get mucher higher load and
 latencies after upgrading from 2.1.6 to cassandra 2.1.7
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    [ https://issues.apache.org/jira/browse/CASSANDRA-9683?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14625518#comment-14625518 ] 

Ariel Weisberg commented on CASSANDRA-9683:
-------------------------------------------

So 2.1.8 doesn't have the same performance issue that is addressed by nodetool disableautocompaction that 2.1.7 has?

That it is gone is good. I will look at the diff between the three releases to see if we can find out what change caused it. If it was compaction I would have thought I would be able to reproduce it on one node when I upgraded from 2.1.6 to 2.1.7. When I upgraded I didn't see any compactions and there was no load from the C* process.

> Get mucher higher load and latencies after upgrading from 2.1.6 to cassandra 2.1.7
> ----------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-9683
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9683
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: Ubuntu 12.04 (3.13 Kernel) * 3
> JDK: Oracle JDK 7
> RAM: 32GB
> Cores 4 (+4 HT)
>            Reporter: Loic Lambiel
>            Assignee: Ariel Weisberg
>             Fix For: 2.1.x
>
>         Attachments: cassandra-env.sh, cassandra.yaml, cfstats.txt, os_load.png, pending_compactions.png, read_latency.png, schema.txt, system.log, write_latency.png
>
>
> After upgrading our cassandra staging cluster version from 2.1.6 to 2.1.7, the average load grows from 0.1-0.3 to 1.8.
> Latencies did increase as well.
> We see an increase of pending compactions, probably due to CASSANDRA-9592.
> This cluster has almost no workload (staging environment)


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