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?^_^ >
