[HIVE-1093] Add a "skew join map join size" variable to control the input size of skew join's following map join job.

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.6.0
• Hadoop Flags: Reviewed
• Assignee: He Yongqiang
• Reporter: He Yongqiang
• Created: 25/Jan/10 04:43
• Updated: 17/Dec/11 00:03
• Resolved: 28/Jan/10 17:33

Description

In a test, many skew join key itself >250M size. And the following mapjoin will take several hours to do a mapjoin for those big skew keys.
This can be better by using a small map input size for the following map join job.