To the folks that received the email: I’m realizing that there are some cases where the data might be misleading. In order to estimate how much time your machines would have been throttled if quotas were enabled, we allowed balances to go negative. This assumes that the machine would have eventually used the same amount of CPU time, even if it had been throttled.
In this example, the machine backed off for a long period of time. If the quotas had been enforced and the machine backed off like this, it would have accumulated a quota balance again. Because quotas were not enforced though, the balance had gone negative enough that the balance never re-accumulated.
Let me know if that’s confusing and I can try to explain it further.