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From: Jonathan Ellis <jbellis@gmail.com>
Date: Tue, 7 Sep 2010 13:15:41 -0500
Message-ID: <AANLkTikF17LxqzfvxKNmnQJUxuB5i+GZgTAsryBPNaKo@mail.gmail.com>
Subject: Re: Capping the memory limit in cassandra
To: user@cassandra.apache.org
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see http://www.mail-archive.com/user@cassandra.apache.org/msg03583.html

On Tue, Sep 7, 2010 at 12:38 PM, Dathan Pattishall <dathanvp@gmail.com> wro=
te:
> For this java process
>
> /opt/java/bin/java -ea -Xms1G -Xmx7G -XX:+UseParNewGC
> -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=
=3D8
> -XX:MaxTenuringThreshold=3D1 -XX:+HeapDumpOnOutOfMemoryError
> -Dcom.sun.management.jmxremote.port=3D8181
> -Dcom.sun.management.jmxremote.ssl=3Dfalse
> -Dcom.sun.management.jmxremote.authenticate=3Dfalse
> -Dstorage-config=3D/opt/cassandra/bin/../conf -cp
> /opt/cassandra/bin/../conf:/opt/cassandra/bin/../build/classes:/opt/cassa=
ndra/bin/../lib/antlr-3.1.3.jar:/opt/cassandra/bin/../lib/apache-cassandra-=
0.6.4.jar:/opt/cassandra/bin/../lib/clhm-production.jar:/opt/cassandra/bin/=
../lib/commons-cli-1.1.jar:/opt/cassandra/bin/../lib/commons-codec-1.2.jar:=
/opt/cassandra/bin/../lib/commons-collections-3.2.1.jar:/opt/cassandra/bin/=
../lib/commons-lang-2.4.jar:/opt/cassandra/bin/../lib/google-collections-1.=
0.jar:/opt/cassandra/bin/../lib/hadoop-core-0.20.1.jar:/opt/cassandra/bin/.=
./lib/high-scale-lib.jar:/opt/cassandra/bin/../lib/ivy-2.1.0.jar:/opt/cassa=
ndra/bin/../lib/jackson-core-asl-1.4.0.jar:/opt/cassandra/bin/../lib/jackso=
n-mapper-asl-1.4.0.jar:/opt/cassandra/bin/../lib/jline-0.9.94.jar:/opt/cass=
andra/bin/../lib/json-simple-1.1.jar:/opt/cassandra/bin/../lib/libthrift-r9=
17130.jar:/opt/cassandra/bin/../lib/log4j-1.2.14.jar:/opt/cassandra/bin/../=
lib/slf4j-api-1.5.8.jar:/opt/cassandra/bin/../lib/slf4j-log4j12-1.5.8.jar
> org.apache.cassandra.thrift.CassandraDaemon
>
> I set the max memory size to 7G yet Cassandra is taking
>
>
> PID USER =A0 =A0 =A0PR =A0NI =A0VIRT =A0RES =A0SHR S %CPU %MEM =A0 =A0TIM=
E+ =A0COMMAND
>
>
>
> 6992 root =A0 =A0 =A018 =A0 0 32.8g =A029g =A021g S =A0 19 93.9 =A0 5685:=
14
> /opt/java/bin/java -ea -Xms1G -Xmx7G -XX:+UseParNewGC
> -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=
=3D8
> -XX:M
>
> why is that, and how do I cap the memory used for cassandra? Is this a bu=
g
> or a mistake on my part?
>
>


--=20
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com