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From 吴朱华 <ikew...@gmail.com>
Subject Re: big issue on retrieving 400MB data
Date Fri, 28 Apr 2017 06:35:46 GMT
Oops, I just resend it, you know the chinese network^_^

2017-04-28 14:20 GMT+08:00 Mostafa Mokhtar <mmokhtar@cloudera.com>:

> Btw the profile wasn't attached.
> Please resend.
>
> On Thu, Apr 27, 2017 at 11:11 PM, 吴朱华 <ikewu83@gmail.com> wrote:
>
>> 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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