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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