我在apache pig中运行foreach操作时遇到一个outofmemory错误。

16/06/24 15:14:17 INFO util.SpillableMemoryManager: first memory     
handler call- Usage threshold init = 164102144(160256K) used =
556137816(543103K) committed = 698875904(682496K) max =
698875904(682496K)

java.lang.OutOfMemoryError: Java heap space
-XX:OnOutOfMemoryError="kill -9 %p"
Executing /bin/sh -c "kill -9 4095"... Killed

我的Pig剧本：

A = LOAD 'PageCountTest/' USING PigStorage(' ') AS (Project:chararray, 
Title:chararray, count:int , size:int); 

B = GROUP A BY (Project,Title); 

C = FOREACH B 
generate group, SUM(A.count) AS COUNT; D = ORDER C BY COUNT DESC;

STORE C INTO '/user/hadoop/wikistats';

样本数据：

aa.b Main_Page 1 14335
aa.d India 1 4075
aa.d Main_Page 1 13190
aa.d Special:RecentChanges 1 200
aa.d Talk:Main_Page/ 1 14147
aa.d w/w/index.php 9 137502
aa Main_Page 6 9872
aa Special:Statistics 1 324

有人能帮忙吗？