are, that is what you
> should try to tune first.
>
>
>
>
> On Fri, Jul 18, 2014 at 9:36 AM, diogo wrote:
>
>> This is probably a simple question, but I'm noticing that for queries
>> that run on 1+TB of data, it can take Hive up to 30 minutes to actually
>&
This is probably a simple question, but I'm noticing that for queries that
run on 1+TB of data, it can take Hive up to 30 minutes to actually start
the first map-reduce stage. What is it doing? I imagine it's gathering
information about the data somehow, this 'startup' time is clearly a
function of
So, I have a query like this:
select
user.id
ud_name.value as name
ud_age.value as age
from user
left outer join user_data ud_name on user.id = ud_name.user_id and
ud_name.key = 'name'
left outer join user_data ud_age on user.id = ud_age.user_id and ud_age.key
= 'age'
...
;
With multiple joins
