franz1981 edited a comment on issue #2845: ARTEMIS-2336 Use zero copy to replicate journal/page/large message file (AGAIN) URL: https://github.com/apache/activemq-artemis/pull/2845#issuecomment-547275684 Ok, now it is more clear, thanks! So ByteBufs start to be accumulated due to FileRegions time to send. I will take another look to the file region = false case, but probably accounting correctly with a custom msg estimator could make the back-pressure to be triggered before, but i'm not sure... In the worst case I could just use something similar to what we were using before, maybe cleaning it up a lil more given that we are touching these bits
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