The synchronization rate to the downstream TiDB cluster is very slow when using TiCDC

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

Original topic: TiCDC同步到下游TiDB集群时速率很慢

| username: kevinY

[TiDB Usage Environment] Production Environment
[TiDB Version] V6.3.0

Help, help!!!
Our TiCDC is experiencing slow synchronization rates when syncing to the downstream TiDB cluster. Monitoring shows an abnormal metric, which is the conflict detection time in the image below, taking several seconds. Why is this happening? Ps. Our sync table is a large table with 300 million records.