6.4.2. Refresh dashboard
Click the Refresh dashboard icon 
to immediately run every query on the dashboard and refresh the visualizations. When you trigger a refresh, any pending requests are canceled.
By default, the cPacket dashboards do not automatically refresh. Queries run on their own schedule according to the panel settings. However, if you want to refresh the dashboard regularly, click the down arrow next to the Refresh dashboard icon and then select a refresh interval.