Packet for query is too large （mysql数据写入数据过大问题）

Packet for query is too large (4259580 > 4194304). You can change this value on the server by setting the max_allowed_packet' variable. 当出现这种异常的时候，代表着写入操作的数据超过了mysql限定的单次写入操作的数据大小上限。 上面异常的提示You can ch

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