Degraded performance on fetching workload units for the app

This incident has been resolved.

Some of the workload charts are still experiencing degraded performance. We are working on a long-term fix.

We have successfully identified one root cause of the workload units engine malfunctioning, which had to do with query performance against a third party database that powers workload usage.
We have implemented a short term fix that should allow all the charts to load properly.
We are communicating with the our vendor to make sure that this service's underlying engine will durably preserve the mitigation we put in place, in order to guarantee predictable performance and stability on this service.

We have limited the scope of the behavior so that loading apps is fast now. We are still investigating why it's slow to load workload charts on editor.

We have identified degraded performance on fetching workload units. It could affect loading apps on editor or viewing workload usage on the app. We have not found any evidence that it affects runtime performance.