The question again.
(The question before, but did not respond.)
I would like to know how to change the time to run the Splunk search inquiries.
About 1 hour learned through testing.
To ask why.
If you were to generate real-time through DashBoard
An hour later, the problem occurs.
Search did not run. (there is no change of the Data)
Reflash must screen every hour.
Not sure if I understand your question correctly, but did you have chance to check this post before to see if it solved your issue?
http://splunk-base.splunk.com/answers/24238/dashboard-automatic-refresh
dashboard screen refresh, when the search is run again, while "waiting" can solve the problem shown Is there any?