Ah39 commented on issue #538: 发送消息到master-broker 偶尔报RemotingTimeoutException: wait response on the channel <******:10910> timeout, 3000(ms)，这个是什么原因，求解？ URL: https://github.com/apache/rocketmq/issues/538#issuecomment-444089628 根本问题是：一个文件，即使再怎么优化，用cas操作不一定比锁性能好。应该要做的是把主题拆成不同文件，不要写入到一个commitlog 中，这样能大幅提高性能
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