What do the graphs show when a failure occurrs?

The performance graphs do not show failures, they simply assume that the data points continue at their pre-failure levels until recovery. So you won't see any gaps in your graphs (unless a failure has continued for at least 30 minutes)

While this may be slightly confusing, it can be useful in that it shows more clearly exactly what the readings were immediately prior to failure.

In future we aim to offer more clarity around this situation within the graphs themselves.