Ah39 commented on issue #575: while not use FileChannel.write()? rocketmq use mmap file write , may cause use a lot of share memory URL: https://github.com/apache/rocketmq/issues/575#issuecomment-444465582 @duhengforever but the rocketmq may hold 100G even more SHR memory . **how to control the memory use by rocketmq ,by mmap file ??** 
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