MySQL 错误. Packet for query is too large (***> 4194304). You can change......

1. 错误描述

        错误关键字:

            Packetfor query is too large (***> 4194304). You can change this value on theserver by setting the max_allowed_packet' variable.

         错误样例截图:     

            从错误中, 我们看到是 一次插入的数据过大, 大于了设置的4M. 也提示了解决方案"Youcan change this value on the server by setting the max_allowed_packet'variable." 

2. 查看max_allowed_packet值的方法 

          show VARIABLES like'%max_allowed_packet%';

3. 更改方法,

    方案 1.  临时更改

set global max_allowed_packet =2*1024*1024*10;
show VARIABLES like'%max_allowed_packet%';

    方案2.   永久更改(拥有更高的这个权限.)

            方法一,  需直接配置文件, 并重启MySQL服务.

                

    

            方法二: 从客户端更改, 更改后重启MySQL服务.