The API was not available during 2 time chunks

chunk 1: from 12:34:33pm to 12:35:08pm (35 seconds)
chunk 2: from 12:35:46pm to 12:36:42 (56 seconds)
The first chunk was the result of an unexpectedly large analytics query from one of our customers combined with an improper thread management at the server level (blocking other queries).

The second chunk was a consequence of the accumulation of requests during the first chunk that overloaded the replicas once they started processing requests a...