Hi Chunky
This parameter will come into effect only if a query has been parsed to
multiple mapreduce jobs and some of them can be executed in parallel. ie all
the jobs generated by the query are not linearly dependent and hence needn't be
executed sequentially. In all other cases the MR jobs wi
this parameter is a query execution optimization approach.
hive.exec.parallel if set to true, hive determines that if few stages
of your mapreduce job can run independently and if yes then schedules
them accordingly.
If you set this value in hive-site.xml and wants to see its set or
not, then use
