MySQL server has gone away : Error while uploading sql file in phpmyadmin
1) Open file my.cnf
xampp : /opt/lampp/etc/my.cnf
apache2 (Debian) : /etc/mysql/my.cnf
httpd (RHEL, CentOS) : /etc/my.cnf
2) Set value max_allowed_packet=128M under attribute [mysqld]
If parameter is not there, add it under attribute [mysqld] .
[mysqld] max_allowed_packet=128M
3) Restart mysql.
