Mysql的max_allowed_packet设定

修改前

[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
#log-error = /var/log/mysql/error.log
# By default we only accept connections from localhost
#bind-address = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

修改后

[mysqld]
pid-file = /var/run/mysqld/mysqld.pid
socket = /var/run/mysqld/mysqld.sock
datadir = /var/lib/mysql
#log-error = /var/log/mysql/error.log
# By default we only accept connections from localhost
#bind-address = 127.0.0.1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
max_allowed_packet = 256M

重启容器并确认

mysql> show variables like '%max_allowed_pack%';
+--------------------------+------------+
| Variable_name | Value |
+--------------------------+------------+
| max_allowed_packet | 268435456 |
| slave_max_allowed_packet | 1073741824 |
+--------------------------+------------+
2 rows in set (0.01 sec)
mysql>

所以已经看到已经成功设定为256M(268435456)了

liumiaocn:~ liumiao$ echo "256*1024*1024" |bc
268435456
liumiaocn:~ liumiao$

总结