I don’t know why I thought using the Percona MySQL server was a good idea. I was going through the Ubuntu Server Guide and saw the Percona configuration tool.
I should have known better than to keep pursuing this “enhancement” when the configuration file didn’t work. But I didn’t, and after a few weeks of fighting it, I decided to go back to the plain Jane MySQL server distributed through the Ubuntu repositories.
Reverting to the standard MySQL server turned out to be easier said than done. The Percona enhancement fights tooth and nail to keep running on your system, but there’s a simple way to kill it.