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From Kashif Hussain <>
Subject Hive Insert taking a lot of time
Date Mon, 02 Nov 2015 12:36:09 GMT
I am trying to insert data into orc table from a text table.The query is as
follows :

insert into table test_orc(x,y) select * from test where x=4 and y=5 ;

The MR is taking a lot of time and all but one reducer got completed
quickly.But the last reducer is taking a lot of time.
The total data size is 2.9 TB. I am not able to understand why only one
reducer is taking so much of time ? Is it because whole map output went to
a single reducer ?


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