Hi, I noticed high consumer speedup (>10x) when I do not acknowledge individual messages but bunch of them at once. I use client acknowledge mode as in the case of failure to correctly process the message I may lose it. Seeing message more than once is not a (big) problem. Currently I consume with MessageListener.onMessage() but this doesn't allow me to acknowledge batch of messages - I do not know in advance when next message will come (if any) so the messages might be in acquired state for long time. With MessageConsumer.receive(timeout) I could read the messages and acknowledge batch of them and in the case of timeout, acknowledge them too. What are suggested values for timeout and batch size? Are there other options to check and tune? The broker is C++ 0.18.
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