修改hive内存限制

错误：

GB physical memory used; 4.7 GB of 2.1 GB virtual memory used. Killing container.

Dump of the process-tree for container_1454126356092_0026_01_000373

<property>

        <name >mapred.child.java.opts</name>

        <value>-Xmx3024m </value>

    </property>

    <property>

        <name>mapreduce.reduce.memory.mb</name>

        <value>4096</value>

    </property>

    <property>

        <name>mapreduce.map.memory.mb</name>

        <value>4096</value>

    </property>