dm/conf/java/hadoop/mapred-env.sh

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# export JAVA_HOME=/home/y/libexec/jdk1.6.0/

export HADOOP_JOB_HISTORYSERVER_HEAPSIZE=1000

export HADOOP_MAPRED_ROOT_LOGGER=INFO,RFA

#export HADOOP_JOB_HISTORYSERVER_OPTS=
#export HADOOP_MAPRED_LOG_DIR="" # Where log files are stored.  $HADOOP_MAPRED_HOME/logs by default.
#export HADOOP_JHS_LOGGER=INFO,RFA # Hadoop JobSummary logger.
#export HADOOP_MAPRED_PID_DIR= # The pid files are stored. /tmp by default.
#export HADOOP_MAPRED_IDENT_STRING= #A string representing this instance of hadoop. $USER by default
#export HADOOP_MAPRED_NICENESS= #The scheduling priority for daemons. Defaults to 0.