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From "Robbie Strickland (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-9607) Get high load after upgrading from 2.1.3 to cassandra 2.1.6
Date Thu, 18 Jun 2015 15:33:03 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14591977#comment-14591977
] 

Robbie Strickland edited comment on CASSANDRA-9607 at 6/18/15 3:32 PM:
-----------------------------------------------------------------------

Yes it does.  It seems from our observation to be related to 1) our heavy use of DTCS combined
with [CASSANDRA-9549|https://issues.apache.org/jira/browse/CASSANDRA-9549] and 2) severe GC
pauses (such that it was GCing constantly).  

We were able to make things stable by moving to G1 with the following modifications:

{code}
#JVM_OPTS="$JVM_OPTS -Xmn${HEAP_NEWSIZE}"
JVM_OPTS="$JVM_OPTS -XX:+UseG1GC"
JVM_OPTS="$JVM_OPTS -XX:MaxGCPauseMillis=1000"
JVM_OPTS="$JVM_OPTS -XX:+UseTLAB -XX:+ResizeTLAB"
JVM_OPTS="$JVM_OPTS -XX:-UseBiasedLocking"
{code}

This is still a work in progress, but it has allowed us to reach a stable state.


was (Author: rstrickland):
Yes it does.  It seems from our observation to be related to 1) our heavy use of DTCS combined
with [CASSANDRA-9549|https://issues.apache.org/jira/browse/CASSANDRA-9549] and 2) severe GC
pauses (such that it was GCing constantly).  

We were able to make things stable by moving to G1 with the following modifications:

{{code}}
#JVM_OPTS="$JVM_OPTS -Xmn${HEAP_NEWSIZE}"
JVM_OPTS="$JVM_OPTS -XX:+UseG1GC"
JVM_OPTS="$JVM_OPTS -XX:MaxGCPauseMillis=1000"
JVM_OPTS="$JVM_OPTS -XX:+UseTLAB -XX:+ResizeTLAB"
JVM_OPTS="$JVM_OPTS -XX:-UseBiasedLocking"
{{code}}

This is still a work in progress, but it has allowed us to reach a stable state.

> Get high load after upgrading from 2.1.3 to cassandra 2.1.6
> -----------------------------------------------------------
>
>                 Key: CASSANDRA-9607
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9607
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: OS: 
> CentOS 6 * 4
> Ubuntu 14.04 * 2
> JDK: Oracle JDK 7
>            Reporter: Study Hsueh
>            Priority: Critical
>         Attachments: load.png
>
>
> After upgrading cassandra version from 2.1.3 to 2.1.6, the average load of my cassandra
cluster grows from 0.x~1.x to 3.x~6.x. 
> What kind of additional information should I provide for this problem?



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