Why is the full synchronization dump phase in DM taking a long time, and why is the export table exceeding 100%?

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This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: dm 全量同步dump阶段时间很长，而且导出表超过100%是什么原因

| username: Hacker007

Why does the number of tables exported during full synchronization in DM show more than 100%? The dump phase has been going on for a long time.

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| username: 小王同学Plus | Original post link

Hello, if the upstream data volume is relatively large, it may cause the dump time to be too long. Is the synchronization now proceeding as expected?

If there are any issues, please provide the DM version and the task configuration.

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| username: Hacker007 | Original post link

Thank you for the reply. There are no more issues now, it’s just that the dump stage took much longer than expected.

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| username: Minorli-PingCAP | Original post link

IO-intensive operations, the export of dumpling is affected by concurrency parameters.

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| username: system | Original post link

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