Check for MySQL 5.6 and performance-schema #81
Description
With MySQL 5.6, the performance-schema option is on by default. With MySQL 5.6 and newer with performance-schema enabled, MySQL uses up to 40% of memory on a 1 GB system. It uses only 6% when performance-schema is disabled. It might be worthwhile to add a check for this being enabled, especially on low-memory systems.