connection timeout on DirectQuery not publishing?

my dataset has millions of rows and i was trying to use DirectQuery and it was timeing out.
i saw it has a limit to 1 million rows BUT before that i updated my local desktop report and set the timeout = 30 mins.
published the report to online workspace and published to iFrame.
i was still getting the timeout and error says 
More details: The XML for Analysis request timed out before it was completed. Timeout value: 225 sec.

i do not know if this timeout is that same one i updated, and if it is, why didn't it update?

or perhaps it has something to do with the internal calls to the data?