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From Tim Armstrong <tarmstr...@cloudera.com>
Subject Re: why does impala have a bad performance on disk write?
Date Wed, 20 Jul 2016 20:27:49 GMT
Hi Jerry,
  You are right that we only use one thread per impalad. We're working on
full multithreading of plans, which should address that bottleneck
(although that work is still a little while away).

- Tim

On Wed, Jul 20, 2016 at 1:51 AM, 445484859@qq.com <445484859@qq.com> wrote:

>
> Hello, all
>     When I use Impala to run a SQL query like 'INSERT INTO/OVERWRITE',
>  it would be too slow.
>     It seems like that only one thread will do disk write. If so, What
> for the design?
>
> ------------------------------
> Jerry
> 445484859@qq.com
>
>

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