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Posted to dev@impala.apache.org by yu feng <ol...@gmail.com> on 2017/11/24 02:27:46 UTC
How to deal with query with many fragments
Hi, we always meet this question, a new User may submit a query with many
'union all' subqueries, which leading to a SQL will generate more than 5000
fragments to be executed.
Impala has low ability of resource isolation。 did someone has
some experience about this and resource isolation in impala。 Thanks a lot
Re: How to deal with query with many fragments
Posted by Jim Apple <jb...@cloudera.com>.
dev to bcc
You might find some help here:
http://impala.apache.org/docs/build/html/topics/impala_admission.html#admission_architecture
After that, I'd expect you might get more answers with a more specific
question.
On Thu, Nov 23, 2017 at 6:27 PM, yu feng <ol...@gmail.com> wrote:
> Hi, we always meet this question, a new User may submit a query with many
> 'union all' subqueries, which leading to a SQL will generate more than 5000
> fragments to be executed.
>
> Impala has low ability of resource isolation。 did someone has
> some experience about this and resource isolation in impala。 Thanks a lot
>
Re: How to deal with query with many fragments
Posted by Jim Apple <jb...@cloudera.com>.
dev to bcc
You might find some help here:
http://impala.apache.org/docs/build/html/topics/impala_admission.html#admission_architecture
After that, I'd expect you might get more answers with a more specific
question.
On Thu, Nov 23, 2017 at 6:27 PM, yu feng <ol...@gmail.com> wrote:
> Hi, we always meet this question, a new User may submit a query with many
> 'union all' subqueries, which leading to a SQL will generate more than 5000
> fragments to be executed.
>
> Impala has low ability of resource isolation。 did someone has
> some experience about this and resource isolation in impala。 Thanks a lot
>