No, the sender HWM applies to each queue independently. Further, if a
peer is offline nothing is queued for it, unless it's using durable
sockets, which is a disrecommended pattern since it'll rapidly kill
publishers.

Understood. The example was referring to durable subscribers. So there is no way to safely protect the publisher from running out of memory (especially with durable subscribers). Even if you set the the HWM the total memory consumption is also dependant on the count of subscribers.


Pieter, thanks for your explanation

-Helge
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