We are working on this to understand and resolve the situation.
Have a look on the below links for initial steps.
Sometimes we see Transactions/Sec average is 450 but Max values is above 5000 Transactions/sec. But when we checked with our test teams they confirmed that the tests will trigger around 400 Transactions/Sec only. Any idea why this sudden burst up. Is it something that has to be tuned on Collectors?
Have you seen this kind of behaviour earlier?