It's been a busy year for MySQL. Perhaps you've heard. Here are some recent improvements to the speed, scalability, and user-friendliness of the MySQL database and the InnoDB storage engine that we think deserve their own headlines. Now is a great time to beta test the 5.5 release and give feedback to the MySQL engineering team.
information_schema. MySQL 5.1 transfers the possibility to do this directly to privileged database users so they can extend the
information_schemathemselves, in any way they see fit.