Frequently asked questions

Q: Will Percona Server for MySQL with XtraDB invalidate our MySQL support?

A: We don’t know the details of your support contract. You should check with your Oracle representative. We have heard anecdotal stories from MySQL Support team members that they have customers who use Percona Server for MySQL with XtraDB, but you should not base your decision on that.

Q: Will we have to GPL our whole application if we use Percona Server for MySQL with XtraDB?

A: This is a common misconception about the GPL. We suggest reading the Free Software Foundation ‘s excellent reference material on the GPL Version 2, which is the license that applies to MySQL and therefore to Percona Server for MySQL with XtraDB. That document contains links to many other documents which should answer your questions. Percona is unable to give legal advice about the GPL.

Q: Do I need to install Percona client libraries?

A: No, you don’t need to change anything on the clients. Percona Server for MySQL is 100% compatible with all existing client libraries and connectors.

Q: When using the Percona XtraBackup to set up a replication replica on Debian-based systems I’m getting: “ERROR 1045 (28000): Access denied for user ‘debian-sys-maint’@’localhost’ (using password: YES)”

A: In case you’re using the init script on Debian-based system to start mysqld, be sure that the password for debian-sys-maint user has been updated and it’s the same as that user’s password from the server that the backup has been taken from. The password can be seen and updated in /etc/mysql/debian.cnf. For more information on how to set up a replication replica using Percona XtraBackup see this how-to.