I'm not sure if this is even possible in Google Analytics. Is there a way to find out the maximum number of visitors that visited a site within a time period of one minute, or one hour? Or is the data only available per day.
migrated from stackoverflow.com Aug 2 '11 at 22:33
Looks like by the hour is available.
Under Visitors -> Visitor Trending -> Visits
Click on the clock to the right of Graph by (under date range).
Visitors -> Overview -> Graph by (on right, under date) -> Hour