hive 本地mapjoin时,两个表关联,不group by,没有reduce,速度快很多,请问,map join 内存怎么设置,也就是下面红色子体 maximum memory怎么调大点
Total jobs = 2
Stage-7 is selected by condition resolver.
Stage-1 is filtered out by condition resolver.
省略多行……
2016-01-13 02:12:07 Starting to launch local task to process map join; maximum memory = 507314176
2016-01-13 02:12:08 Dump the side-table into file: file:/tmp/hadoop/hive_2016-01-13_14-12-03_250_7479951554923701866-1/-local-10003/HashTable-Stage-5/MapJoin-mapfile30--.hashtable
2016-01-13 02:12:09 Uploaded 1 File to: file:/tmp/hadoop/hive_2016-01-13_14-12-03_250_7479951554923701866-1/-local-10003/HashTable-Stage-5/MapJoin-mapfile30--.hashtable (16919925 bytes)
2016-01-13 02:12:09 End of local task; Time Taken: 2.297 sec.
Execution completed successfully
MapredLocal task succeeded
Launching Job 2 out of 2