duhengforever edited a comment 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-444446833 @Ah39 Compared with FileChannel, MMAP can write to the page cache directly, but FileChannel with directbuffer needs to write to memory first, then write to the page cache. so MMAP has an advantage when writing a lot of small data into a file.
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