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From Victor Kabdebon <victor.kabde...@gmail.com>
Subject Re: Cassandra memory consumption
Date Tue, 08 Feb 2011 15:32:04 GMT
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.kabdebon@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
>

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