mysql max_allowed_packet 设置过小导致记录写入失败

1：当前默认配置

mysql> show VARIABLES like '%max_allowed_packet%';
+--------------------------+------------+
| Variable_name | Value |
+--------------------------+------------+
| max_allowed_packet | 4194304 |
| slave_max_allowed_packet | 1073741824 |
+--------------------------+------------+
2 rows in set (0.00 sec)

2：修改配置文件

vi /etc/my.cnf

[mysqld] 下面增加下面配置：

max_allowed_packet=10M

3：重启mysql

service mysqld restart

再次查看修改后的配置

mysql> show VARIABLES like '%max_allowed_packet%';
+--------------------------+------------+
| Variable_name | Value |
+--------------------------+------------+
| max_allowed_packet | 10485760 |
| slave_max_allowed_packet | 1073741824 |
+--------------------------+------------+
2 rows in set (0.00 sec)