The PERFORMANCE SCHEMA is dead, long live the performance schema

The PERFORMANCE SCHEMA is dead

The initial implementation of the performance schema used to name tables in the performance schema database in UPPERCASE, as in 'EVENTS_WAITS_CURRENT'.

This naming scheme turned up to be difficult to work with (see Bug#57609), especially considering the established MySQL practice of converting table names to lowercase, using the lower_case_table_names server setting.

Long live the performance schema

Starting with MySQL 5.5.8, the performance schema tables have been renamed to lowercase.

This guarantees that a query such as 'select * from performance_schema.events_waits_current' will work consistently across any server deployment, regardless of the server platform or the server lower_case_table_names configuration parameter.

Life for people or automated tools using the performance schema just became much easier ...