Above shows connecting 5k proxies and some configs.

What happens is we all start generating CDS for all of them. This means we are holding 5k XDS requests (the big one! because the first has the node and is giant as a result) and in-flight CDS configs.

Because we are trying to generate 5k CDS at once, our CPU grinds to a halt due to throttling. Some responses take 3 minutes to complete.

Clearly we are better off not allowing so many concurrently...