Widgets displaying No Data Available.

Widgets displaying No Data Available.

This is occuring on Dashboards where we have several widgets loading.  I can reload the widget and get data some times, but as it refreshes, some of them revert to "No Data Available" while others display and on the next refresh, a different set may show data that did not previously while those that did now stop. 
 
The Widget we are seeing this with is "Last N Hours CPU Utilization" where we have 3 in one dashboard for 3 servers, but it is also occuring for "Last N Hours Memory Utilization" for the same 3 servers.  Reloading an individual widget will some times get the data, and on occasion it takes 2 or 3 refreshes. 
 
We have other widgets on this dashboard that have no issues such as "Devices with Alarms" and "Last 24 Hours Devices By" for Memory Utilization, CPU Utilization, and Availability.
 
Is this there a means to extend time-outs or something to get a more reliable display of the widgets on this dashboard?

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