Hi! You can go to the JMX page: http://<namenode>:50070/jmx to find out what the Heap Memory and usage is. Yes we know that there is a problem in the scripts. I believe its being handled as part of https://issues.apache.org/jira/browse/HADOOP-9902
On Friday, October 18, 2013 2:07 AM, ch huang <[email protected]> wrote: hi,all: what i want is allocate different heap size to namenode and datanode ,so i add the following info in hadoop-env.sh file export HADOOP_NAMENODE_OPTS="-Xmx2048m" but, i am very confuse about the output of ps , here is two -Xmx option value ,i do not know which is the real heap size that the namenode use,anyone can help? # ps -ef|grep namenode hdfs 14468 1 36 15:00 ? 00:00:05 /usr/java/jdk1.6.0_35/bin/java -Dproc_namenode -Xmx1000m -Dhadoop.log.dir=/var/log/hadoop-hdfs -Dhadoop.log.file=hadoop-hdfs-namenode-CHBM220.log -Dhadoop.home.dir=/usr/lib/hadoop -Dhadoop.id.str=hdfs -Dhadoop.root.logger=INFO,RFA -Djava.library.path=/usr/lib/hadoop/lib/native -Dhadoop.policy.file=hadoop-policy.xml -Djava.net.preferIPv4Stack=true -Xmx2048m -Dhadoop.security.logger=INFO,RFAS org.apache.hadoop.hdfs.server.namenode.NameNode
