Redshift Upsert Size Limitations




Does anyone know of any known size limitations with the Redshift Upsert Connector? I have a dataset that has roughly 125 columns and 18Mil records. We would like to drastically reduce the amount of time this takes to run by only updating the most recent 6 months (nearly 4 million rows), however, DOMO throws the below error in doing so. 


"Out of memory: Try a smaller fetch size."