In the ProjectWise Administrator datasource properties, statistics tab, there is a date and time for when the data was last updated. Other than the manual refresh button, how to configure how often the data is refreshed.
On the ProjectWise Integration server, in the dmskrnl.cfg file (c:\program files\Bentley\projectwise\bin), there is a setting called StatisticsFrequency. By default, this is set to 12 hours (value in seconds.) It is not recommended to run the statistics too often because it can take time depending on the size of your database. The value can be set to 0 to not have the stats run automattically.
After the Integration server service is started, PW will wait the amount of time set for this value before first updating the statistics. It will then run again 12 hours (or whatever the value is set to) after that.
Note that this timer is restarted back to zero any time the server or service is restarted, and will not update for another 12 hours.