Hello, I'm a colleague of Francesco. We just made another test , just connecting, without subscribing, in order to check if the problem is the authorization procedure... and we discovered that this step doesn't occupy a lot of cpu (never reached 5% of usage). So we can say that the "heavy" step is the subscription procedure made after connection. For each client , we made a subscription to 50 topics (different for each clients). In our test we subscribed 2000 clients (so, 50x2000 = 100K topics). During this period (that has requested 1h), the CPU of broker during subscriptions was ever near 100% of usage! Can you help us Justin, to understand why ?? Thanks.
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