I would use prefetch as 10MB bytes... I wouldn't use a prefetch of one.. that 
would be too slow.


I would not also use global-max-size...  I want to change defaults on the 
broker on having every destination with a sensible max-size (such as 10MB).. if 
one destination falls behind you would have that destination flowing to disk 
only. 

Only reason I didn't do that is because this would represent a semanic change 
and I can only do that on an eventual Artemis 3.0... as some users use browser, 
filtering and they would prefer having all the messages in memory. (I argue 
about that though.. but that's where we are).


So.. have a max-size per destination at 10MB

Have you max-read at 10MB  and prefetch at 10MB


prefetch is just the blocks you use to read.. having it at one would make it 
calling too many tasks to depage data.

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