edit

container/conf/java/hadoop/mapred-site.xml

@@ -6,20 +6,20 @@
     </property>
     <property>
 	　　<name>mapreduce.map.memory.mb</name>
-	　　<value>1024</value>
+	　　<value>640</value>
 		<description>每个Map任务的物理内存限制</description>
 	</property>
 	<property>
 	　　<name>mapreduce.reduce.memory.mb</name>
-	　　<value>2048</value>
+	　　<value>1280</value>
 		<description>每个Reduce任务的物理内存限制</description>
 	</property>
 	<property>
 	　　<name>mapreduce.map.java.opts</name>
-	　　<value>-Xmx1024M</value>
+	　　<value>-Xmx512M</value>
 	</property>
 	<property>
 	　　<name>mapreduce.reduce.java.opts</name>
-	　　<value>-Xmx2048M</value>
+	　　<value>-Xmx1024M</value>
 	</property>
 </configuration>

container/conf/java/hadoop/yarn-site.xml

@@ -7,17 +7,17 @@
     </property> 
     <property>
         <name>yarn.nodemanager.resource.memory-mb</name>
-        <value>1536</value>
+        <value>2048</value>
         <discription>每个节点可用内存,单位MB</discription>
     </property>
     <property>
         <name>yarn.scheduler.minimum-allocation-mb</name>
-        <value>1024</value>
+        <value>640</value>
         <discription>单个任务可申请最少内存，默认1024MB</discription>
     </property>
     <property>
         <name>yarn.scheduler.maximum-allocation-mb</name>
-        <value>2048</value>
+        <value>1536</value>
         <discription>单个任务可申请最大内存，默认8192MB</discription>
     </property>
     <property>
@@ -25,7 +25,7 @@
         <value>1536</value>
         <discription>AM能够申请的最大内存，默认值为1536MB</discription>
     </property>
-    <!--property>
+    <property>
         <name>yarn.nodemanager.pmem-check-enabled</name>
         <value>false</value>
     </property>
@@ -33,7 +33,7 @@
         <name>yarn.nodemanager.vmem-check-enabled</name>
         <value>false</value>
     </property>
-    <property>
+    <!--property>
         <name>yarn.resourcemanager.scheduler.class</name>
         <value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler</value>
     </property>