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From 吴朱华 <ikew...@gmail.com>
Subject Re: big issue on retrieving 400MB data
Date Fri, 28 Apr 2017 06:11:25 GMT
Profile is in the attachment, thanks


2017-04-28 13:10 GMT+08:00 Dimitris Tsirogiannis <dtsirogiannis@cloudera.com
>:

> Maybe you also want to post some information about the schema (how wide
> your table is, does it use nested types, etc) as well as the profile of the
> slow query.
>
> Dimitris
>
> On Thu, Apr 27, 2017 at 9:30 PM, 吴朱华 <ikewu83@gmail.com> wrote:
>
> > Hi guys:
> > we can facing a big issue when select * from a big table.
> > The performance is 17minutes for retrieving 400MB data. Even slow under
> > JDBC situation.
> > Is there anyway to improve it?^_^
> >
>

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