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From Ivan Weng <iw...@pivotal.io>
Subject Re: elastic execution engine question
Date Fri, 01 Jul 2016 01:31:47 GMT
How about hash table?

On Fri, Jul 1, 2016 at 9:30 AM, Hubert Zhang <hzhang@pivotal.io> wrote:

> For random table, the virtual segment number is related to the data size of
> the table. For large tables, we prefer use more virtual segments to achieve
> better performance. While for small tables, less virtual segments are
> needed, which could save resources and enable more concurrent queries.
>
> On Fri, Jul 1, 2016 at 9:22 AM, yanqing weng <wengyanqing@gmail.com>
> wrote:
>
> > Hi HAWQ developer,
> >
> > Elastic execution engine is the important feature in HAWQ 2.0.
> >
> > I have a question for this feature in the HAWQ debugging. Is there
> possible
> > to control the virtual segment number when run query ? If so, which GUC
> or
> > parameter I should set ? Thanks.
> >
>
>
>
> --
> Thanks
>
> Hubert Zhang
>

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