Splunk DB Connect - Tail input not updating

I'm connecting to an Oracle database using a tail input. I've gotten it all working, however, splunk shows that the last update is yesterday afternoon when I initially set it up. I know there are new rows out there. In looking at the debug log, I found this:

monsch1:INFO:Scheduler - Execution of input=[dbmon-tail://Scap Monitor/Scap Tail monitor with convert] finished in duration=32 ms with resultCount=0 success=true continueMonitoring=true

So it looks like it is checking for updates but not finding any? I'm using a PROCESS_ID column as my rising column - this column is updated a primary sequential key.