thanks for your answer, I send three mails detailing, you must have missed
one, briefing:
we're running a like tpch on an 8 processor machine, performance grows from
1 to 5 streams, but in 5 streams and up results get steady, I mean, the
results are measured on query-per-hour, it is obtained multiplying for the
number of streams and dividing for real time, so when your up of 5 streams
it is supposed than performance must grow up to 7 or 8 streams, but it gets
steady.
thank and regard