Hi, mixa
It seams you changed the name? Or maybe I was missing.
I delete the default /etc/my.cnf all ready for this test.
Maybe I think this is the OS problem. As you know, some packages maybe included in the OS.
When I executed mysql, may this bin file is not Percona’s mysql.
I will try to executed /app/mysql/bin/mysql and watch it’s out.
Thanks a lot for your help and be sorry for update so late.