Hi Tony
As I said earlier, I am not much conversant with UWL, however, looking at the RFC calls it seems that for every work item the system is calling SAP_WAPI_GET_HEADER to get the header information of a single work item at a time and SAP_WAPI_GET_OBJECTS is used to get the associated business/class objects associated with a single work item at a time. Both of these RFC function modules take a single work item ID as an input.
So, logically speaking, the number of work items would have an impact on the number of RFC calls..
If this is a recent spike, please check which new workflows or changes to an existing workflow has happened lately. Also it is quite possible that some IDOC functionality has been activated .... coz for some idocs there are work items generated (especially failure cases)...AND if there are repeated failures , the work items can go up.
SWI2_FREQ is a good transaction which can give an overview of Workflows - Top level as well as Work item level. Just select the appropriate date range and check which TASK (Work items) have the maximum entries or which Workflow (Header level/sub-WF) has maximum entries . Compare with the time range earlier to this spike. If there is a huge difference, this might be the cause.
If not, then let's wait for experts in UWL area to provide us some guidance :-)
Regards,
Modak