After upgrading two MySQL-Servers which run Master-Slave replication from Percona MySQL 5.5 to Percona MySQL 5.6 an excessive amount of temporary Tables gets created on the slave. The Master seems to ...
when I use CREATE TEMPORARY TABLE to create a temporary table, the collation of this table is utf8_unicode_ci by default. why by default it is utf8_unicode_ci? How can I change the default?