I had to downgrade from Percona 5.6 back to 5.5 as I couldn’t get it to work with Cpanel (php wouldn’t compile and apache wouldn’t start with 5.6 installed). Running CentOS6.4 and Percona installed / upgraded via YUM.
Now, after downgrading, I’m getting a few errors relating to tables in the mysql database that were created during the upgrade process.
I’ve tried searching, and can’t find any information on this problem yet.
I managed to fix the issue with procs_priv.frm, general_log.frm and slow_log.frm by copying the .frm file over from another installation of 5.5, but I can’t seem to so anything with the other errors.
The only thing I’ve found relating to these tables is here : http://dba.stackexchange.com/questions/48166/cannot-open-table-mysql-innodb-index-stats
Is it possible to drop those tables from the database if they aren’t needed in 5.5?