服务器的日志一直报Packet for query is too large (7632997 > 4194304). You can change this value on the server by setting the max_allowed_packet' variable.的解决方法

最近服务器上的项目老是频繁的就崩掉了，重启之后过了一晚第二天来就又挂了，查看tomcat的日志有报内存溢出的错误，还有报Packet for query is too large (7632997 > 4194304). You can change this value on the server by

setting the max_allowed_packet' variable.错误。服务上的数据库是mysql。然后查了一下资料是MySQL的一个系统参数问题:max_allowed_packet，其默认值为1048576(1M)，查询：show VARIABLES like '%max_allowed_packet%';
修改此变量的值：MySQL安装目录下的my.ini文件中的[mysqld]段中的＂max_allowed_packet = 1M＂，如更改为4M(或更大，如果没有这行内容，增加一行)，保存，重起MySQL服务。现在可以load大于1M的文件了。

注意）如果服务器上的mysql安装目录下找不到my.ini文件，可能是被隐藏，把它显示出来就行了。

原文博客的链接地址：https://cnblogs.com/qzf/

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