GoldMine regularily polls the Calendar table to ensure that the calendar is always up to date. This polling interval can be increased to lower the amount of network traffic.
Go to Edit -> Preferences (Tools -> Options in GMPE) and in the dialog box select calendar.
Change the ‘calendar refresh rate’ to a higher value.
Press OK to close the dialog box.
Login for the changes to take effect.
Note: This is only effective for the current user.