wiki.apache.org/cassandra/FAQ#mmap On Tue, Sep 20, 2011 at 8:12 AM, Evgeniy Ryabitskiy <evgeniy.ryabits...@wikimart.ru> wrote: > Hi, > I am running Cassandra over Linux VMs, each VM is: 2GB RAM, 4 core CPU. > Using RPM distribution. I have set -Xmx to 512M in cassandra-env.sh > > After day of running I see that Cassandra process is utilizing over 80% of > memory that is 3 times more then 512M. > In result after 2 days of running, Cassandra process is killed by OS > (without OutOfMemoryException). > > Here is ps aux output. Could you help to understand this behavior? > > > USER PID %CPU %MEM VSZ RSS TTY STAT START TIME > COMMAND > 103 1067 2.5 80.7 6417932 1693508 ? > SLl 01:06 24:30 /usr/java/jre1.6.0_26/bin/java -ea > -javaagent:/usr/share/cassandra//lib/jamm-0.2.2.jar -XX:+UseThreadPriorities > -XX:ThreadPriorityPolicy=42 -Xms512M -Xmx512M -Xmn128M > -XX:+HeapDumpOnOutOfMemoryError -Xss128k -XX:+UseParNewGC > -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8 > -XX:MaxTenuringThreshold=1 -XX:CMSInitiatingOccupancyFraction=75 > -XX:+UseCMSInitiatingOccupancyOnly -Djava.net.preferIPv4Stack=true > -Dcom.sun.management.jmxremote.port=7199 > -Dcom.sun.management.jmxremote.ssl=false > -Dcom.sun.management.jmxremote.authenticate=false > -Dlog4j.configuration=log4j-server.properties > -Dlog4j.defaultInitOverride=true > -Dcassandra-pidfile=/var/run/cassandra/cassandra.pid -cp > /etc/cassandra/conf:/usr/share/cassandra/lib/antlr-3.2.jar:/usr/share/cassandra/lib/apache-cassandra-0.8.5.jar:/usr/share/cassandra/lib/apache-cassandra-thrift-0.8.5.jar:/usr/share/cassandra/lib/avro-1.4.0-fixes.jar:/usr/share/cassandra/lib/avro-1.4.0-sources-fixes.jar:/usr/share/cassandra/lib/commons-cli-1.1.jar:/usr/share/cassandra/lib/commons-codec-1.2.jar:/usr/share/cassandra/lib/commons-collections-3.2.1.jar:/usr/share/cassandra/lib/commons-lang-2.4.jar:/usr/share/cassandra/lib/concurrentlinkedhashmap-lru-1.1.jar:/usr/share/cassandra/lib/guava-r08.jar:/usr/share/cassandra/lib/high-scale-lib-1.1.2.jar:/usr/share/cassandra/lib/jackson-core-asl-1.4.0.jar:/usr/share/cassandra/lib/jackson-mapper-asl-1.4.0.jar:/usr/share/cassandra/lib/jamm-0.2.2.jar:/usr/share/cassandra/lib/jline-0.9.94.jar:/usr/share/cassandra/lib/jna.jar:/usr/share/cassandra/lib/json-simple-1.1.jar:/usr/share/cassandra/lib/libthrift-0.6.jar:/usr/share/cassandra/lib/log4j-1.2.16.jar:/usr/share/cassandra/lib/servlet-api-2.5-20081211.jar:/usr/share/cassandra/lib/slf4j-api-1.6.1.jar:/usr/share/cassandra/lib/slf4j-log4j12-1.6.1.jar:/usr/share/cassandra/lib/snakeyaml-1.6.jar > org.apache.cassandra.thrift.CassandraDaemon > > > Evgeny. > >
-- Jonathan Ellis Project Chair, Apache Cassandra co-founder of DataStax, the source for professional Cassandra support http://www.datastax.com
