1、修改mysqld的配置文件my.cnf
调整max_allowed_packet的值，修改为5M就比较合适了。
[mysqld]
port = 3308
socket = /dev/shm/mysqld.sock
skip-external-locking
key_buffer_size = 16M
max_allowed_packet = 10M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
2、修改[mysqld]中的值
[mysqldump]
quick
max_allowed_packet = 10M
参考：http://www.111cn.net/database/mysql/106911.htm