edit

container/conf/java/hadoop/capacity-scheduler.xml

@@ -23,7 +23,7 @@
 
   <property>
     <name>yarn.scheduler.capacity.maximum-am-resource-percent</name>
-    <value>0.1</value>
+    <value>0.5</value>
     <description>
       Maximum percent of resources in the cluster which can be used to run 
       application masters i.e. controls number of concurrent running

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

@@ -6,12 +6,12 @@
     </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>

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

@@ -7,22 +7,22 @@
     </property> 
     <property>
         <name>yarn.nodemanager.resource.memory-mb</name>
-        <value>2048</value>
+        <value>1536</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>
         <name>yarn.app.mapreduce.am.resource.mb</name>
-        <value>2048</value>
+        <value>1536</value>
         <discription>AM能够申请的最大内存，默认值为1536MB</discription>
     </property>
     <property>