[elasticsearch] Can't start up: not enough memory

[root@luwakh elasticsearch]# /etc/init.d/elasticsearch start
正在啟動 elasticsearch：                                   [  確定  ]
[root@luwakh elasticsearch]# Can't start up: not enough memory

env use elasticsearch-1.2.0.noarch.rpm 

1.2 以後要使用 java7 

並且設定java path

export JAVA_HOME=/usr/jdk64/jdk1.7.0_45

export PATH=$PATH:${JAVA_HOME}/bin