spark 慢，咋解决啊，如何增加map数，总是150

INFO scheduler.TaskSetManager: Finished task 102.0 in stage 0.0 (TID 45) in 718419 ms on datanode2 (139/150)
15/11/27 14:52:24 INFO scheduler.TaskSetManager: Finished task 89.0 in stage 0.0 (TID 123) in 716908 ms on datanode2 (140/150)
15/11/27 14:52:24 INFO scheduler.TaskSetManager: Finished task 20.0 in stage 0.0 (TID 15) in 720604 ms on datanode2 (141/150)
15/11/27 14:52:28 INFO scheduler.TaskSetManager: Finished task 17.0 in stage 0.0 (TID 87) in 720623 ms on datanode2 (142/150)
15/11/27 14:54:35 INFO scheduler.TaskSetManager: Finished task 112.0 in stage 0.0 (TID 56) in 851590 ms on datanode2 (143/150)
15/11/27 14:54:42 INFO scheduler.TaskSetManager: Finished task 51.0 in stage 0.0 (TID 104) in 854820 ms on datanode2 (144/150)
这个慢，咋解决啊

优化下试试，下面仅供参考，希望有所帮助
Spark性能优化的10大问题及其解决方案
http://www.aboutyun.com/thread-12676-1-1.html


Spark之性能优化
http://www.aboutyun.com/thread-11547-1-1.html



书籍推荐：
Spark大数据处理：技术、应用与性能优化(全)【397页】
http://www.aboutyun.com/thread-14636-1-1.html