Information on the system : *Debian 5* *Jvm :* victor@testhost:~/database/apache-cassandra-0.6.6$ java -version java version "1.6.0_22" Java(TM) SE Runtime Environment (build 1.6.0_22-b04) Java HotSpot(TM) 64-Bit Server VM (build 17.1-b03, mixed mode)
*RAM :* 2Go 2011/2/8 Victor Kabdebon <victor.kabde...@gmail.com> > Sorry Jonathan : > > So most of these informations were taken using the command : > > sudo ps aux | grep cassandra > > For the nodetool information it is : > > /bin/nodetool --host localhost --port 8081 info > > > Regars, > > Victor K. > > > 2011/2/8 Jonathan Ellis <jbel...@gmail.com> > > I missed the part where you explained where you're getting your numbers >> from. >> >> On Tue, Feb 8, 2011 at 9:32 AM, Victor Kabdebon >> <victor.kabde...@gmail.com> wrote: >> > It is really weird that I am the only one to have this issue. >> > I restarted Cassandra today and already the memory compution is over the >> > limit : >> > >> > root 1739 4.0 24.5 664968 494996 pts/4 SLl 15:51 0:12 >> > /usr/bin/java -ea -Xms128M -Xmx256M -XX:+UseParNewGC >> -XX:+UseConcMarkSweepGC >> > -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8 >> -XX:MaxTenuringThreshold=1 >> > -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly >> > -XX:+HeapDumpOnOutOfMemoryError -Dcom.sun.management.jmxremote.port=8081 >> > -Dcom.sun.management.jmxremote.ssl=false >> > -Dcom.sun.management.jmxremote.authenticate=false >> > -Dstorage-config=bin/../conf -cp >> > >> bin/../conf:bin/../build/classes:bin/../lib/antlr-3.1.3.jar:bin/../lib/apache-cassandra-0.6.6.jar:bin/../lib/avro-1.2.0-dev.jar:bin/../lib/cassandra-javautils.jar:bin/../lib/clhm-production.jar:bin/../lib/commons-cli-1.1.jar:bin/../lib/commons-codec-1.2.jar:bin/../lib/commons-collections-3.2.1.jar:bin/../lib/commons-io-1.4.jar:bin/../lib/commons-lang-2.4.jar:bin/../lib/commons-pool-1.5.4.jar:bin/../lib/google-collections-1.0.jar:bin/../lib/hadoop-core-0.20.1.jar:bin/../lib/hector-0.6.0-14.jar:bin/../lib/high-scale-lib.jar:bin/../lib/ivy-2.1.0.jar:bin/../lib/jackson-core-asl-1.4.0.jar:bin/../lib/jackson-mapper-asl-1.4.0.jar:bin/../lib/jline-0.9.94.jar:bin/../lib/jna.jar:bin/../lib/json-simple-1.1.jar:bin/../lib/libthrift-r917130.jar:bin/../lib/log4j-1.2.14.jar:bin/../lib/perf4j-0.9.12.jar:bin/../lib/slf4j-api-1.5.8.jar:bin/../lib/slf4j-log4j12-1.5.8.jar:bin/../lib/uuid-3.1.jar >> > org.apache.cassandra.thrift.CassandraDaemon >> > >> > It is really an annoying problem if we cannot really foresee memory >> > consumption. >> > >> > Best regards, >> > Victor K >> > >> > 2011/2/8 Victor Kabdebon <victor.kabde...@gmail.com> >> >> >> >> Dear all, >> >> >> >> Sorry to come back again to this point but I am really worried about >> >> Cassandra memory consumption. I have a single machine that runs one >> >> Cassandra server. There is almost no data on it but I see a crazy >> memory >> >> consumption and it doesn't care at all about the instructions... >> >> Note that I am not using mmap, but "Standard", I use also JNA (inside >> lib >> >> folder), i am running on debian 5 64 bits, so a pretty normal >> configuration. >> >> I also use Cassandra 0.6.8. >> >> >> >> >> >> Here are the informations I gathered on Cassandra : >> >> >> >> 105 16765 0.1 34.1 1089424 687476 ? Sl Feb02 14:58 >> >> /usr/bin/java -ea -Xms128M -Xmx256M -XX:+UseParNewGC >> -XX:+UseConcMarkSweepGC >> >> -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8 >> -XX:MaxTenuringThreshold=1 >> >> -XX:CMSInitiatingOccupancyFraction=75 >> -XX:+UseCMSInitiatingOccupancyOnly >> >> -XX:+HeapDumpOnOutOfMemoryError >> -Dcom.sun.management.jmxremote.port=8081 >> >> -Dcom.sun.management.jmxremote.ssl=false >> >> -Dcom.sun.management.jmxremote.authenticate=false >> >> -Dstorage-config=bin/../conf -Dcassandra-foreground=yes -cp >> >> >> bin/../conf:bin/../build/classes:bin/../lib/antlr-3.1.3.jar:bin/../lib/apache-cassandra-0.6.6.jar:bin/../lib/avro-1.2.0-dev.jar:bin/../lib/cassandra-javautils.jar:bin/../lib/clhm-production.jar:bin/../lib/commons-cli-1.1.jar:bin/../lib/commons-codec-1.2.jar:bin/../lib/commons-collections-3.2.1.jar:bin/../lib/commons-io-1.4.jar:bin/../lib/commons-lang-2.4.jar:bin/../lib/commons-pool-1.5.4.jar:bin/../lib/google-collections-1.0.jar:bin/../lib/hadoop-core-0.20.1.jar:bin/../lib/hector-0.6.0-14.jar:bin/../lib/high-scale-lib.jar:bin/../lib/ivy-2.1.0.jar:bin/../lib/jackson-core-asl-1.4.0.jar:bin/../lib/jackson-mapper-asl-1.4.0.jar:bin/../lib/jline-0.9.94.jar:bin/../lib/jna.jar:bin/../lib/json-simple-1.1.jar:bin/../lib/libthrift-r917130.jar:bin/../lib/log4j-1.2.14.jar:bin/../lib/perf4j-0.9.12.jar:bin/../lib/slf4j-api-1.5.8.jar:bin/../lib/slf4j-log4j12-1.5.8.jar:bin/../lib/uuid-3.1.jar >> >> org.apache.cassandra.thrift.CassandraDaemon >> >> >> >> result of nodetool info : >> >> >> >> 116024732779488843382476400091948985708 >> >> Load : 1,94 MB >> >> Generation No : 1296673772 >> >> Uptime (seconds) : 467550 >> >> Heap Memory (MB) : 120,26 / 253,94 >> >> >> >> >> >> I have about 21 column families, none of them have a lot of information >> ( >> >> as you see I have 2 Mb of text which is really small). Even if I set >> Xmx at >> >> 256 there is 687M of memory used. Where does this memory come from ? >> Bad >> >> garbage collection ? Something that I ignore ? >> >> Thank you for your help I really need to get rid of that problem. >> >> >> >> Best regards, >> >> Victor Kabdebon >> > >> > >> >> >> >> -- >> Jonathan Ellis >> Project Chair, Apache Cassandra >> co-founder of DataStax, the source for professional Cassandra support >> http://www.datastax.com >> > >
