jiazhai opened a new issue #5513: Publish rate limit on broker to avoid OOM URL: https://github.com/apache/pulsar/issues/5513 Out Of Memory is seen frequently while client produced message too quickly and used all the direct memory. This happens like this: 1. Client send message to broker; 2. Broker call bookkeeper client to write message to Bookie, and hold the direct memory until write success; If in the 2nd step the direct memory not get released, then the Broker will get OOM. It would be great to have a way to detect the memory pressure, and do the publish rate limit if lack of memory; once the memory get back, cancel the rate limit.
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