dev@ does not appear to accept attachments. You can upload it somewhere and post a link, though.
On Thu, Apr 27, 2017 at 11:35 PM, 吴朱华 <[email protected]> wrote: > Oops, I just resend it, you know the chinese network^_^ > > 2017-04-28 14:20 GMT+08:00 Mostafa Mokhtar <[email protected]>: > >> Btw the profile wasn't attached. >> Please resend. >> >> On Thu, Apr 27, 2017 at 11:11 PM, 吴朱华 <[email protected]> wrote: >> >>> Profile is in the attachment, thanks >>> >>> >>> 2017-04-28 13:10 GMT+08:00 Dimitris Tsirogiannis < >>> [email protected]>: >>> >>>> 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 <[email protected]> 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?^_^ >>>> > >>>> >>> >>> >> >
