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Date: Sat, 2 May 2015 02:34:07 +0000 (UTC)
From: "Jonathan Ellis (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
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Subject: [jira] [Updated] (CASSANDRA-9240) Performance issue after a restart
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     [ https://issues.apache.org/jira/browse/CASSANDRA-9240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis updated CASSANDRA-9240:
--------------------------------------
    Reviewer: T Jake Luciani

[~tjake] to review

> Performance issue after a restart
> ---------------------------------
>
>                 Key: CASSANDRA-9240
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9240
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Alan Boudreault
>            Assignee: Benedict
>            Priority: Minor
>             Fix For: 3.x
>
>         Attachments: Cassandra.snapshots.zip, cassandra_2.1.4-clientrequest-read.log, cassandra_2.1.4.log, cassandra_2.1.5-clientrequest-read.log, cassandra_2.1.5.log, cassandra_trunk-clientrequest-read.log, cassandra_trunk.log, cassandra_trunk_no_restart-clientrequest-read.log, cassandra_trunk_no_restart.log, issue.yaml, run_issue.sh, runs.log, trace_query.cql
>
>
> I have noticed a performance issue while I was working on compaction perf tests for CASSANDRA-7409. The performance for my use case is very bad after a restart. It is mostly a read performance issue but not strictly. I have attached my use case (see run_issue.sh and issue.yaml) and all test logs for 2.1.4, 2.1.5 and trunk:
> * 2.1.* are OK (although 2.1.4 seems to be better than 2.1.5?): ~6-7k ops/second and ~2-2.5k of read latency.  
> * trunk is NOT OK: ~1.5-2k ops/second and 25-30k of read latency.
> * trunk is OK without a restart: ~ same perf than 2.1.4 and 2.1.5.
> EDIT: branch cassandra-2.1 is OK.
> I can help to bisect and/or profile on Monday if needed.


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