iamzhoug37 commented on issue #249: master-slave sync model performance improve URL: https://github.com/apache/rocketmq/issues/249#issuecomment-396801624 first question: the flush disk and slave fetch message are performed concurrently. second question: I guess you are using sync_flush,the flush of dis or other in lock operation cost too much time,then causes the other thread wait on lock cost too much.The lock has cost,but this cost is acceptable compared to disk flush.
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