We are on Clarity version that's lower than 15.5.
When we run the Load Data Warehouse job, it's quite slow. When we check the DWH_GATHER_METRICS_V we see that much of the time taken is for table DWH_X_INV_SUM_FACTS
Release: CODFSS99000-15.3-PPM SAAS FedRAMP-Sandbox-Small Environment
DWH_X_INV_SUM_FACTS slowness resolved with S159280 in 15.5.0 and higher